Southwest Airlines 10-K 2025-12-31

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

For the fiscal year ended December 31, 2025

Commission File No. 1-7259

SOUTHWEST AIRLINES CO.

(Exact name of registrant as specified in its charter)

Registrant's telephone number, including area code: (214) 792-4000

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes x No o

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes o No x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes x No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. x

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. Yes ☐ No x

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1(b). Yes ☐ No x

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐ No x

The aggregate market value of the common stock held by non-affiliates of the registrant was approximately $16,890,396,912 computed by reference to the closing sale price of the common stock on the New York Stock Exchange on June 30, 2025, the last trading day of the registrant’s most recently completed second fiscal quarter.

Number of shares of common stock outstanding as of the close of business on February 3, 2026: 491,317,990 shares

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Definitive Proxy Statement for the Company’s Annual Meeting of Shareholders to be held May 07, 2026, are incorporated into Part III of this Annual Report on Form 10-K.

TABLE OF CONTENTS

-PART I-

Company Overview

Southwest Airlines Co. (the “Company” or “Southwest”) operates Southwest Airlines, a major passenger airline that provides scheduled air transportation in the United States and near-international markets. Southwest commenced service on June 18, 1971, with three Boeing 737 aircraft serving three Texas cities: Dallas, Houston, and San Antonio. Southwest’s unique route network, competitive fares, and famous Hospitality continue to make the Company an attractive choice for Customers in cities across the United States and near-international destinations. As of December 31, 2025, Southwest had a total of 803 Boeing 737 aircraft in its fleet and served 117 destinations in 42 states, the District of Columbia, the Commonwealth of Puerto Rico, and ten near-international countries: Mexico, Jamaica, The Bahamas, Aruba, Dominican Republic, Costa Rica, Belize, Cuba, the Cayman Islands, and Turks and Caicos.

Company Initiatives

As part of the Company's ongoing modernization efforts, the Company is executing several transformational initiatives designed to elevate the Customer Experience on its flights, improve financial performance, and drive Shareholder value, including:

• Assigned and Extra Legroom Seating**: On January 27, 2026, Southwest began operating assigned and extra legroom seating to better align with airline passenger preferences. Passengers can now choose between a standard seat, a preferred seat near the front of the cabin, or an extra legroom seat with additional pitch.

• Redesigned Boarding Model**: Southwest evolved its boarding process beginning January 27, 2026, by prioritizing Customers into boarding groups based on seat location, fare bundle, and loyalty program status, beginning with extra legroom seats in boarding groups 1 and 2.

• Global Airline Partnerships**: In 2025, Southwest launched its first partnerships with international carriers to expand its network and connect Customers with more global destinations to generate additional demand for travel across the Southwest network.

• Getaways by Southwest™**: Southwest launched a new in-house vacation product, Getaways by Southwest (“Getaways”), in August 2025 to offer customizable vacation packages that come with Customer-friendly policies including a generous cancellation policy and flexibility with no change fees.

• 24-Hour Operations**: In 2025, Southwest added 24-hour operation capabilities with the introduction of overnight (i.e., redeye) flights in key markets to maximize aircraft utilization. The Company intends to expand redeye flights to additional markets in 2026.

• Marketing & Distribution Evolution**: In order to attract new Customers and reach them where they are performing travel searches today, Southwest expanded into new channels such as Expedia, Priceline, Google Flights, Kayak, and Skyscanner to broaden its Customer base and begin to engage them in its loyalty program.

Company Operations

Route Structure

Southwest primarily provides “point-to-point” service, rather than the “hub-and-spoke” service provided by most major U.S. airlines. A point-to-point system enables airlines to connect directly to destinations without providing connecting service. By contrast, the hub-and-spoke system concentrates most of an airline's operations at a limited number of central hub cities and serves most other destinations in the system by providing one-stop or connecting service through a hub. By not concentrating operations exclusively through one or more central transfer points,

Southwest's route structure has allowed for more direct nonstop routing than a traditional hub-and-spoke service. To provide greater connectivity and support operational reliability and recoverability, in recent years the Company has increasingly focused on designing its network around core stations. By blending intentional connectivity offered by hub-and-spoke models and point-to-point nonstops, the Company is able to capture nonstop demand and provide reliable one-stop itinerary options.

Southwest’s unique route network has also enabled it to provide its markets with frequent, conveniently timed flights and competitive fares. For example, Southwest offers up to 12 weekday roundtrips between Dallas Love Field and Houston Hobby, 12 weekday roundtrips between Sacramento and San Diego, 12 weekday roundtrips between San Diego and San Jose, 12 weekday round trips between Las Vegas and San Diego, and 11 weekday roundtrips between Las Vegas and Sacramento. Southwest complements its high-frequency short-haul routes with mid-range and long-haul nonstop service, including flights between Hawaii and California, Las Vegas, and Phoenix, and between markets such as Las Vegas and Washington Reagan, Los Angeles and Nashville, New York LaGuardia and Houston, Los Angeles and Baltimore, Oakland and Houston, and San Diego and Baltimore. As the domestic travel market has matured and structural changes have reduced the demand for short-haul travel, the Company has increased its proportion of longer-haul flights. Further, the Company introduced 24-hour operation capabilities in 2025 with the commencement of redeye flights. Southwest now offers over 50 peak-day redeye flights during peak periods and includes flights across the continental United States and from Hawaii to the U.S. mainland, with plans to offer flights from Alaska to the U.S. mainland in 2026.

The table below sets forth data regarding the Company's nonstop service, aircraft stage length, and trip duration over the last three years:

The Company continually works to better optimize its route network and schedule through the adjustment of flights in its existing markets and the addition of new markets and itineraries, while also pruning less profitable flights from its schedule. During 2025, the Company focused on expanding its network, announcing service at five new locations beginning in 2026, including Cyril E. King International Airport in St. Thomas; McGhee Tyson Airport in Knoxville, Tennessee; Ted Stevens Anchorage International Airport in Alaska; Charles M. Schulz Sonoma County Airport in Santa Rosa, California; and Princess Juliana International Airport in St. Maarten. Additionally, the Company launched partnerships with six international airlines to provide Customers access to more global destinations. The Company’s partnerships with international carriers have improved its international connectivity with its domestic network. The Company also sought to enhance connectivity and better optimize its network to match capacity to demand and adjust for Customer travel patterns by reducing short-haul trips, redistributing resources to longer-haul trips in more profitable markets, and reducing flying on weekdays and at off-peak times with lower travel demand. In response to market conditions, the Company redeployed underperforming capacity by significantly reducing service at Atlanta and Fort Lauderdale, while expanding service at Nashville and San Diego. The Company is continuing to improve the connectivity and efficiency of its network through redesigns in smaller cities and the introduction of redeye flying. The Company’s unique route network allows for these adjustments without structurally disrupting its airports in core markets and other large cities.

Cost Structure

General

A key component of the Company's business strategy is its focus on cost discipline and charging competit

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The Company’s operations and financial results are subject to various risks and uncertainties, including but not limited to those described below. Other risks are described in “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations,” “Item 7A. Quantitative and Qualitative Disclosures About Market Risk,” and the Consolidated Financial Statements and related Notes thereto. The Company’s business could also be affected by additional risks and uncertainties not currently known to the Company or that it currently deems to be immaterial. If any of these risks actually occurs, it could materially harm the Company’s business, financial condition, or results of operations, or impair the Company’s ability to implement its strategic plans. In that case, the market price of the Company’s common stock could decline. The following risk factors are summarized as financial; operational; information technology, cybersecurity, and data privacy; and legal, regulatory, compliance, and reputational.

Financial Risks

• The airline industry is particularly sensitive to changes in economic conditions, and continued or future unfavorable economic conditions or economic uncertainty could negatively affect the Company’s results of operations and require the Company to adjust its business strategies.

• The Company's business, strategic plans, and profitability can be significantly affected by the availability of jet fuel, fuel prices, and volatility of fuel prices, and the Company's operations are subject to disruption in the event of any delayed supply of fuel.

• The Company’s low-cost structure has historically been a competitive advantage, and many factors have and could continue to adversely affect the Company’s ability to control its costs.

• Increases in insurance costs or reductions in insurance coverage may adversely impact the Company’s operations and financial results.

• The Company’s business, operating results, and financial condition could be adversely impacted if it is unable to effectively execute its strategic plans.

• The airline industry is intensely competitive.

Operational Risks

• The Company is currently dependent on Boeing as the sole manufacturer of the Company’s aircraft. If the MAX aircraft were to become unavailable for the Company’s operations, or if the Company were not able to procure future aircraft in a timely manner or on favorable commercial terms, the Company’s business plans, strategies, and results of operations could be materially and adversely affected.

• Introducing a new aircraft manufacturer or fleet type could impose significant operational complexities, regulatory requirements, and costs on the Company.

• The Company could be materially adversely affected in the event of conflict with its Employees or its Employees’ representatives or if the Company were unable to employ and retain appropriate numbers of qualified Employees to maintain its operations.

• The Company is currently dependent on a single engine supplier, as well as single suppliers of certain other aircraft parts and equipment; therefore, the Company could be materially adversely affected (i) if it were unable to obtain timely or sufficient delivery of aircraft parts or equipment or adequate maintenance or other support, (ii) if suppliers were unable to achieve and/or maintain required regulatory certifications or approvals, or (iii) in the event of a mechanical or regulatory issue associated with the Company’s aircraft parts or equipment.

• The airline industry has faced on-going security concerns and related cost burdens; further threatened or actual terrorist attacks, war, or other hostilities could significantly harm the airline industry and the Company’s operations.

• Interruptions or disruptions in service at one of the Company’s core stations have had, and could in the future have, a material adverse impact on its operations.

• The Company’s operations have been, and in the future may again be, materially and adversely disrupted by extreme weather events. The airline industry is made up of inherently complex systems and is affected by many conditions that are beyond its control.

Information Technology, Cybersecurity, and Data Privacy Risks

• The Company is heavily dependent on technology to operate its business; any failure, disruption, breach, or delay in the Company’s information systems or in implementation of necessary changes could materially adversely affect its operations.

• The Company is increasingly exposed to cybersecurity attacks and data incidents impacting its IT Systems, and such incidents could have a disruptive and material adverse effect on the Company’s business, financial position, or results of operations.

• The Company is expanding its use of AI and machine-learning, and any failure in its related strategy, compliance with regulations, or risk management could materially adversely affect its operations, reputation, and/or financial position.

Legal, Regulatory, Compliance, and Reputational Risks

• The Company is subject to extensive government regulation that may disrupt or necessitate modifications to the Company’s operations, business plans, and strategies, or increase the Company’s operating costs.

• Airport capacity constraints and air traffic control inefficiencies have limited and could continue to limit the Company’s growth.

• The Company is subject to various environmental requirements and risks; the cost of compliance with more stringent environmental regulations, failure to comply with environmental regulations, or failure to otherwise manage the risks of climate change effectively could have a material adverse effect on the Company’s results of operations.

• The Company is subject to risks related to its sustainability goals and disclosures, which may affect stakeholder sentiment and the Company’s reputation and brand.

• The Company’s future results may suffer if it is unable to effectively manage its current and contemplated international operations or Extended Operations.

• The Company’s plans to develop commercial relationships with airlines in other parts of the world may not produce the results or returns it expects.

• The Company is currently subject to regulatory actions and pending litigation, and judgment, penalties, or fines rendered against the Company could adversely affect the Company’s operating results.

• Conflicting federal, state, and local laws and regulations may impose additional requirements and restrictions on the Company’s operations, which could increase the Company’s operating costs, result in service disruptions, and increase litigation risk.

• The Company’s reputation and brand could be harmed if it were to experience significant negative publicity through social media or otherwise.

• The Company’s business has been, and could in the future be, negatively affected as a result of actions of activist shareholders, and such activism could adversely affect the strategic direction and business results of the Company.

• The Company has adopted certain provisions in its Bylaws that could increase costs to bring a claim, discourage claims, limit the ability of the Company’s Shareholders to bring a claim, or limit the ability of the Company’s Shareholders to bring a claim in certain judicial forums.

Financial Risks

The airline industry is particularly sensitive to changes in economic conditions; in the event of continued or future unfavorable economic conditions or economic uncertainty, the Company's results of operations could be further negatively affected, which could require the Company to further adjust its business strategies.

The airline industry, which is subject to relatively high fixed costs and highly variable and unpredictable demand, is particularly sensitive to changes in economic conditions, including changes in consumer discretionary spending as a result of inflation, rising interest rates, or other factor

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None.

Cybersecurity Risk Management and Strategy

Risk Assessment and Management

The Company is increasingly dependent on the use of complex technology and systems to run its operations and support its strategic objectives. These technologies and systems include, among others, the Company's website and reservation system; mobile application; flight dispatch and tracking systems; flight simulators; check-in kiosks; aircraft maintenance, planning, and record keeping systems; telecommunications systems; flight planning and scheduling systems; crew scheduling systems; human resources systems; and financial planning, management, and accounting systems. Additionally, the Company must receive and process certain confidential or personal information related to its Customers and Employees to run its business, and the Company's operations depend upon secure collection, processing, retention, and transmission of such information. Therefore, the performance, reliability, and security of the Company's technology infrastructure and information systems are critical to the Company's operations and initiatives.

The Company has an enterprise risk management (“ERM”) program to identify, evaluate, and manage risks. Cybersecurity risks are evaluated alongside other critical business risks under the ERM program to align cybersecurity efforts with the Company's broader business goals and objectives. The Company believes that integrating cybersecurity risks into its ERM program fosters a proactive and holistic approach to cybersecurity, which helps safeguard the Company’s operations, financial condition, and reputation in an ever-evolving threat landscape.

The Company maintains a cybersecurity program that is designed to identify, protect from, detect, respond to, and recover from cybersecurity threats and risks, and protect the confidentiality, integrity, and availability of its information systems, including the information residing on such systems. The National Institute of Standards and Technology Cybersecurity Framework helps the Company inform its cybersecurity agenda and prioritize its cybersecurity activities. The Company takes a risk-based, threat-informed approach to cybersecurity, which begins with the identification and evaluation of cybersecurity risks or threats that could affect the Company’s operations, finances, legal or regulatory compliance, or reputation. Once identified, cybersecurity risks and related mitigation efforts are evaluated and prioritized based on their potential impact, likelihood, velocity, and vulnerability, considering both quantitative and qualitative factors. Risk mitigation strategies are developed and implemented based on the specific nature of each cybersecurity risk or threat. These strategies include, among others, the application of cybersecurity policies and procedures, implementation of administrative, technical, and physical controls, and Employee training, education, and awareness initiatives. The Company’s cybersecurity program also includes a Security Operations Center (“SOC”) that conducts ongoing monitoring of networks and systems for potential signs of suspicious activity. The SOC is a centralized function that monitors security alerts to initiate triage, verification, and remediation activities. Additionally, the Company’s cybersecurity program provides mechanisms for Employees to report any unusual or potentially malicious activity they observe. The Company tracks key performance indicators and cybersecurity metrics to evaluate the efficacy of its cybersecurity controls and practices. Further, the Company’s cybersecurity program is periodically reviewed by its Chief Information Officer ("CIO") and Chief Information Security Officer ("CISO" and, together with the CIO, the Company’s “Cybersecurity Leaders”) and adjusted in an effort to maintain the program’s agility and responsiveness as circumstances evolve, new cybersecurity threats emerge, and regulations change.

Incident Response

The Company has a dedicated cybersecurity incident response team responsible for managing and coordinating the Company’s cybersecurity incident response efforts. This team collaborates closely with other internal teams as well as with external experts such as legal advisors, communication specialists, and other key stakeholders, as appropriate, in identifying, protecting from, detecting, responding to, and recovering from cybersecurity incidents. Cybersecurity incidents that meet certain thresholds are escalated to the Cybersecurity Leaders and cross-functional teams on an as-needed basis for support and guidance. Additionally, this team tracks cybersecurity incidents to help identify and analyze them. The Company maintains a cybersecurity incident response plan to prepare for and respond to cybersecurity incidents. The incident response plan includes standard processes for reporting and

escalating cybersecurity incidents, as appropriate, to senior management, the Audit Committee, and the Board. Additionally, the Company conducts at least one cybersecurity tabletop exercise on an annual basis, where members of a cross-functional team engage in a simulated cybersecurity incident scenario. This preparedness exercise is intended to provide hands-on training for the participants and helps the Company assess its cybersecurity response plan and its processes and capabilities in addressing cybersecurity threats.

Use of Third Parties

Cybersecurity Service Providers and Third-Party Consultants. The Company engages cybersecurity consultants, assessors, and other third parties to assess and enhance its cybersecurity practices. These third parties conduct assessments, penetration testing, and vulnerability evaluations to help identify potential weaknesses and recommend improvements. Additionally, the Company leverages a number of third-party tools and technologies as part of its efforts to enhance cybersecurity functions, such as a managed security service provider to augment the Company’s dedicated SOC team, an endpoint detection and response system for continuous monitoring, detection, and response capabilities, and a security information and event management solution to automate real-time threat detection, investigation, and prioritization of high-fidelity alerts.

Oversight of Third-Party Service Providers. The Company also uses third-party service providers to support its operations and many of its technology initiatives. The Company evaluates third-party service providers from a cybersecurity risk perspective, which may include an assessment of that service provider’s cybersecurity posture and/or a recommendation of specific mitigation activities. Following an evaluation, the Company determines and prioritizes service provider risk based on potential threat impact and likelihood, and such risk determinations drive the level of due diligence and ongoing compliance monitoring required for each service provider.

Risks from Material Cybersecurity Threats

As of the date of this report, the Company has not identified any cybersecurity threats that have materially affected or are reasonably likely to have a material effect on the Company's business strategy, results of operations, or financial condition. Although the Company has not experienced cybersecurity incidents that are individually, or in the aggregate, material, the Company and its service providers have experienced cyber-attacks in the past, which the Company believes have thus far been mitigated by preventative, detective, and responsive measures put in place. For a detailed discussion of the Company’s cybersecurity related risks, see “Item 1A. Risk Factors—Information Technology, Cybersecurity, and Data Privacy Risks.”

Cybersecurity Governance

Board Oversight

The Board is responsible for overseeing management’s assessments of major risks facing the Company and for reviewing options to mitigate such risks. The Board’s oversight of major risks, including cybersecurity risks, occurs at both the full Board level and at the Board committee level through the Audit Committee.

The Board. The Chief Executive Officer, the Chief Operating Officer, the Chief Financial Officer, members of senior management, and other personnel and advisors, as requested by the Board, report on the Company’s financial, operating, and commercial strategies, as well as major related risks, which may include cybersecurity risks, at regularly scheduled meetings of the Board. Based on these reports, the Board may request follow-up information and presentations to address any specific concerns and recommendations. Additionally, the Audit Committee has opportunities to report regularly to the entire Board and review with the Board any major issues that arise at the committee level, which may include cybersecurity risks.

The Audit Committee. The Audit Committee reviews with management the Company’s technology and cybersecurity frameworks, policies, programs, opportunities, and risk profile as needed at its regularly scheduled meetings. The Company’s CIO, CISO, members of the cybersecurity team, or other advisors, as requested by the Audit Committee, report periodically on the Company’s technology, data protection, and cybersecurity strategies

and risks. Cybersecurity topics are presented to the Audit Committee on a periodic basis and generally highlight any significant cybersecurity incidents, the cyber threat landscape, cybersecurity program enhancements, cybersecurity risks and related mitigation activities, and any other relevant cybersecurity topics. Management believes that this regular cadence of reporting helps to provide the Audit Committee with an informed understanding of the Company’s dynamic cybersecurity program and threat landscape. As needed, the Audit Committee reviews with management the Company’s business continuity and disaster recovery plans and capabilities and the effectiveness of the Company’s escalation procedures. Based on these management reports, the Audit Committee may request follow-up information and presentations to address any specific concerns and recommendations. In addition to this regular reporting, cybersecurity risks or threats may also be escalated on an as-needed basis to the Audit Committee.

Management’s Role

The Company has a dedicated cybersecurity organization within its technology department that focuses on current and emerging cybersecurity matters. The Company’s cybersecurity function is led by the Company’s CISO, who reports to the Company’s CIO. The Cybersecurity Leaders are actively involved in assessing and managing cybersecurity risks. They are responsible for implementing cybersecurity policies, programs, procedures, and strategies. The responsibilities and relevant experience of each of the Cybersecurity Leaders are listed below:

• The Executive Vice President and CIO provides leadership for the Company’s technology department. The CIO holds an undergraduate degree from Cornell University and has served in various roles in information technology for over 20 years, including Senior Vice President, Vice President, Senior Director, Manager, and Consultant.

• The CISO is responsible for leading the Company’s cybersecurity strategy and department, as well as the protection of data and assets across the Company’s facilities, airports, and aircraft. The CISO has served in various roles in cybersecurity for over 19 years. The CISO earned a Bachelor of Business Administration in Management Information Systems from The University of Oklahoma and holds a Certified Information Systems Security Professional certification. The CISO also participates in the Aviation Information Sharing and Analysis Center Board and is the Vice Chair of the Cybersecurity Council at Airlines for America.

The Company’s cybersecurity department is comprised of teams that engage in a range of cybersecurity activities such as threat intelligence, incident response, security operations, vulnerability management, risk and compliance and security engineering. These teams conduct vulnerability management and penetration testing to identify, classify, prioritize, remediate, and mitigate vulnerabilities. Leaders from each team regularly meet with the Cybersecurity Leaders to provide visibility of relevant issues and seek alignment with strategy. As noted above under “Incident Response,” the Company’s cybersecurity incident response plan includes standard processes for reporting and escalating cybersecurity incidents, as appropriate, to senior management, the Audit Committee, and the Board. Cybersecurity incidents that meet certain thresholds are escalated to the Cybersecurity Leaders and cross-functional teams on an as-needed basis for support and guidance. The Company’s incident response team also coordinates, as needed, with external legal advisors, communication specialists, and other key stakeholders.

Aircraft

Southwest operated a total of 803 Boeing 737 aircraft as of December 31, 2025, of which 82 and 15 were under operating and finance leases, respectively. The following table details information on the 803 aircraft as of December 31, 2025:

(a)See Note 7 to the Consolidated Financial Statements for more information on the Company's lease transactions.

(b)In January 2026, the Company completed retrofits on its -700 fleet to reduce the number of seats to 137 in connection with its implementation of extra legroom seating.

In second quarter and fourth quarter 2025, the Company entered into supplemental agreements with Boeing relating to its contractual order book for -7 and -8 aircraft. These agreements provide flexibility in support of the Company's growth plans and fleet modernization and include certain confidential credits and other concessions provided to the Company by Boeing. The delivery schedule below reflects contractual commitments, although the timing of future deliveries could be affected by any potential or prolonged delays in the manufacturing process or with the -7 certification. The Company retains significant flexibility to manage its fleet size, including opportunities to accelerate fleet modernization efforts if growth opportunities do not materialize.

As of December 31, 2025, the Company had firm deliveries and options for -7 and -8 aircraft as follows:

(a) The delivery timing for the -7 is dependent on the FAA issuing required certifications and approvals to Boeing and the Company. The FAA will ultimately determine the timing of the -7 certification and entry into service, and the Company therefore offers no assurances that current estimations and timelines are correct.

(b) The Company has flexibility to designate firm orders or options as -7s or -8s, upon written advance notification as stated in the contract.

(c) The Company has included the remaining 81 of its 2024 and 2025 contractual but undelivered aircraft (27 -7s and 54 -8s) within its 2026 contractual commitments. As Boeing continues to ramp up production and works to certify the -7, the Company expects 66 -8 aircraft deliveries in 2026. The 2026 contractual detail is as follows:

Ground Facilities and Services

Southwest either leases or pays a usage fee for terminal passenger service facilities at each of the airports it serves, to which various leasehold improvements have been made. The Company leases the land and/or structures on a long-term basis for its aircraft maintenance centers (located at Dallas Love Field, Houston Hobby, Phoenix Sky Harbor, Chicago Midway, Hartsfield-Jackson Atlanta International Airport, Denver International Airport, and Orlando International Airport) and its main corporate headquarters building, also located near Dallas Love Field. The Company also leases a warehouse and engine repair facility in Atlanta. The Company completed construction on a new 129,000 square foot aircraft maintenance facility at Baltimore-Washington International Airport in the second quarter of 2025.

The Company owns two additional headquarters buildings, located across the street from the Company's main headquarters building, on land owned by the Company, including (i) an energy efficient, modern building, called TOPS, which houses certain operational and training functions, including the Company's 24-hour operations and (ii) the Wings Complex, consisting of a Leadership Education and Aircrew Development (“LEAD”) Center (housing the Company's 26 Boeing 737 flight simulators and classroom space for Pilot training), an additional office building, and a parking garage.

The Company has commitments associated with various airport improvement projects, including construction at Houston Hobby International Airport. This project includes the construction of new facilities and the rebuilding or modernization of existing facilities. Construction on the project has begun, and the Company expects construction to be completed in 2027. In April 2023, the Company executed a ground lease agreement with Los Angeles World Airports (“LAWA”) at Los Angeles International Airport (LAX) which provides the Company the right to construct a 9-gate concourse (Concourse 0) adjacent to Terminal 1. The Company expects to manage the design, development, financing, construction, and commissioning of the project, and expects to commence construction in 2028 with construction to be completed in 2032. Prior to commencement of construction, LAWA and the Company will need to agree on scope and budget and have financing in place. Additional information regarding these projects is provided in Note 4 to the Consolidated Financial Statements.

The Company performs substantially all line maintenance on its aircraft and provides ground support services at most of the airports it serves. However, the Company has arrangements with certain aircraft maintenance providers for major component inspections and repairs for its airframes and engines, which comprise the majority of the Company's annual aircraft maintenance costs.

On June 30, 2015, the U.S. Department of Justice (“DOJ”) issued a Civil Investigative Demand (“CID”) to the Company. The CID sought information and documents about the Company’s capacity from January 2010 to the date of the CID, including public statements and communications with third parties about capacity. In June 2015, the Company also received a letter from the Connecticut Attorney General requesting information about capacity. The Company is cooperating fully with the DOJ CID and the state inquiry.

Further, on July 1, 2015, a complaint was filed in the United States District Court for the Southern District of New York on behalf of putative classes of consumers alleging collusion among the Company, American Airlines, Delta Air Lines, and United Airlines to limit capacity and maintain higher fares in violation of Section 1 of the Sherman Act. Since then, a number of similar class action complaints were filed in the United States District Courts for the Central District of California, the Northern District of California, the District of Columbia, the Middle District of Florida, the Southern District of Florida, the Northern District of Georgia, the Northern District of Illinois, the Southern District of Indiana, the Eastern District of Louisiana, the District of Minnesota, the District of New Jersey, the Eastern District of New York, the Southern District of New York, the Middle District of North Carolina, the District of Oklahoma, the Eastern District of Pennsylvania, the Northern District of Texas, the District of Vermont, and the Eastern District of Wisconsin. On October 13, 2015, the Judicial Panel on Multi-District Litigation centralized the cases to the United States District Court in the District of Columbia. On March 25, 2016, the plaintiffs filed a Consolidated Amended Complaint in the consolidated cases alleging that the defendants conspired to restrict capacity from 2009 to present. The plaintiffs seek to bring their claims on behalf of a class of persons who purchased tickets for domestic airline travel on the defendants' airlines from July 1, 2011 to present. They seek treble damages, injunctive relief, and attorneys' fees and expenses. On May 11, 2016, the defendants moved to dismiss the Consolidated Amended Complaint, which the Court denied on October 28, 2016. On December 20, 2017, the Company reached an agreement to settle these cases with a proposed class of all persons who purchased domestic airline transportation services from July 1, 2011, to the date of the settlement. The Company agreed to pay $15 million and to provide certain cooperation with the plaintiffs as set forth in the settlement agreement. After notice was provided to the proposed settlement class and the Court held a fairness hearing, the Court issued an order granting final approval of the settlement on May 9, 2019. On June 10, 2019, certain objectors filed notices of appeal to the United States Court of Appeals for the District of Columbia Circuit, which the Court dismissed on July 9, 2021, for lack of jurisdiction because the district court's order approving the settlements was not a final appealable order. The case is continuing as to the remaining defendants. The Company denies all allegations of wrongdoing.

On January 7, 2019, a complaint alleging a violation of the federal Uniformed Services Employment and Reemployment Rights Act (“USERRA”) and seeking a certification as a class action was filed against the Company in the United States District Court for the Northern District of California. The complaint alleges that the Company violates section 4316(b) of USERRA because it does not provide paid “short-term” military leave (i.e., a military leave of 14 days or fewer) but does provide paid jury duty leave, bereavement leave, and sick leave, which the plaintiff alleges are “comparable” forms of leave under USERRA and its implementing regulations. The complaint seeks declaratory and injunctive relief, damages, liquidated damages, interest, and attorneys’ fees, expert fees, and litigation costs. On February 3, 2021, the Court granted the plaintiff’s motion for class certification and issued an order certifying a class comprised of current or former Employees who, during their employment with the Company at any time from October 10, 2004, through the date of judgment in this action, have taken short-term military leave and were subject to a collective-bargaining agreement, except for Employees subject to the Transport Workers Union Local 550 agreement covering meteorologists. On January 11, 2022, the Court granted the parties’ stipulated request to vacate the trial date as the Department of Defense had not yet produced the class members’ military pay and service records pursuant to the Company’s third-party subpoena. On August 18, 2022, the Court entered an order that effectively stayed the action, except for attention to the third-party subpoena, until after the Ninth Circuit issued its opinion in the matter of Clarkson v. Alaska Airlines, Inc. and Horizon Industries, Inc., an appeal from an order by the United States District Court for the Eastern District of Washington granting summary judgment in defendants’ favor on substantially the same claims at issue in this action. The Ninth Circuit issued its order in Clarkson on February 1, 2023, reversing the district court’s grant of summary judgment and remanding the Clarkson case to the District Court with instructions to consider the “pay during leave” issue in the first instance. The Company has received the military pay and service records. On October 29, 2024, the Company filed a motion to decertify the class, which was then fully briefed and set for hearing. On February 13, 2025, the parties filed a notice of settlement advising the Court that they reached a settlement in principle, and the parties made a stipulated request for the Court to vacate the case schedule, including the hearing on the Company's decertification motion, and to set a deadline of June 19, 2025, for the filing of either a motion for preliminary approval of the class settlement or a status update about the timing of the remaining steps in the settlement process. The Court granted the stipulation on February 14, 2025. On June 20, 2025, the Court granted the parties’ stipulated request to continue the deadline for filing a motion for preliminary approval of the class settlement and the Court reset the deadline for

August 21, 2025. On September 25, 2025, plaintiffs filed a motion for preliminary approval of the settlement class. The class proposed in the settlement modifies the class definition to use an end date of January 1, 2026 (rather than treating the date of judgment as the end date). The settlement includes an $18.5 million settlement fund and prospective relief that includes a differential pay benefit for up to ten days of military leave per year, which will remain in place for at least five years once initiated. On December 11, 2025, the Court granted preliminary approval of the settlement and set the final approval hearing for May 14, 2026.

On December 27, 2019, a former customer service agent at Oakland International Airport, filed a putative class action complaint in the Superior Court of California, for the County of Santa Clara, against the Company alleging the following seven claims under the California Labor Code and Business & Professions Code: (1) failure to provide meal periods; (2) failure to provide rest periods; (3) failure to pay hourly wages; (4) failure to provide accurate wage statements; (5) failure to timely pay all final wages; (6) unfair competition; and (7) civil penalties for the foregoing. Plaintiff filed a First Amended Complaint on October 15, 2021, that asserted the same causes of action and added a named plaintiff. The First Amended Complaint primarily seeks unpaid wages, interest thereon, and associated civil and statutory penalties, along with attorneys’ fees and costs. On February 26, 2025, the Court granted class certification as to the first cause of action for failure to provide meal periods, denied certification on the second through fourth causes of action, and granted certification on the fifth and sixth causes of action only insofar as they are predicated on the first cause of action. The certified class consists of all of the Company’s non-exempt ground employees in California who worked a shift in excess of five hours for the time period between October 24, 2014, forward. On April 17, 2025, the Company filed a summary judgment motion arguing that Plaintiffs’ first cause of action, and all causes of action predicated thereon, failed as a matter of law. The motion was granted on July 25, 2025. Judgment was entered in favor of the Company on September 2, 2025, and Plaintiffs filed a notice of appeal on September 4, 2025. The Company intends to continue to vigorously defend itself in all respects.

On June 22, 2020, a derivative action for breach of fiduciary duty was filed in the United States District Court for the Northern District of Texas naming the members of the Company's Board of Directors (the “Board”) as defendants and the Company as a nominal defendant (the “Derivative Action”). The plaintiff alleges unspecified damage to Company’s reputation, goodwill, and standing in the community, as well as damage from exposure to civil and regulatory liability and defense costs. According to the lawsuit, these damages arise from the Company’s alleged failure to comply with safety and record maintenance regulations and false statements in public filings regarding the Company’s safety practices. The plaintiff alleges the Board, in the absence of good faith, exhibited reckless disregard for its duties of oversight. On October 7, 2020, the Court entered an order staying and administratively closing the Derivative Action, pending the District Court's final resolution of the Company's motion to dismiss in a parallel securities class action under Section 10(b) of the Exchange Act that was filed on February 19, 2020, or upon the occurrence of certain other conditions. While the parallel securities class action was dismissed with prejudice on October 5, 2023, the plaintiff in the Derivative Action has taken no steps to lift the stay in the case, which remains stayed. The Board and Company deny all allegations of wrongdoing made in the Derivative Action.

On August 26, 2021, a complaint alleging breach of contract and seeking certification as a class action was filed against the Company in the United States District Court for the Western District of Texas in Waco. The complaint alleges that the Company breached its Contract of Carriage and other alleged agreements in connection with its use of the allegedly defective MAX aircraft manufactured by The Boeing Company. The complaint seeks damages on behalf of putative classes of customers who provided valuable consideration, whether in money or other form (e.g., voucher, miles/points, etc.), in exchange for a ticket for air transportation with the Company, which transportation took place between August 29, 2017, and March 13, 2019. The complaint generally seeks money damages, declaratory relief, and attorneys’ fees and other costs. On October 27, 2021, the Company filed a multi-faceted motion challenging the complaint based upon lack of subject matter jurisdiction, the existence of a prior-filed complaint on appeal in the Fifth Circuit (the “Sherman Complaint”), improper venue, and failure to state a claim, and seeking to have the complaint's class contentions stricken. That motion was fully briefed by both parties and was argued to a United States Magistrate Judge on June 27, 2022. On July 5, 2022, the Magistrate Judge granted the motion in part and ordered the case stayed until the issuance of the Fifth Circuit's opinion in the Sherman Complaint. On November 28, 2022, the parties jointly notified the Court of the Fifth Circuit's decision regarding the Sherman Complaint. On March 23, 2023, the parties jointly notified the Court of the dismissal of the Sherman Complaint for lack of jurisdiction. Following more recent communications by the parties regarding the status of the stay, the Court directed the parties to file a joint status report, which was filed on February 24, 2025, with the

Company renewing its request that the case be dismissed for lack of standing and lack of subject matter jurisdiction in light of the Fifth Circuit’s decision regarding the Sherman Complaint, which the plaintiffs opposed. On March 11, 2025, the Court heard argument of the parties’ respective positions on the Company’s request for dismissal for lack of standing and lack of subject matter jurisdiction. On June 9, 2025, the Court issued an order dismissing the case for lack of standing and lack of subject matter jurisdiction and entered final judgment in favor of the Company. On July 9, 2025, the plaintiffs in the case filed a notice of appeal to the Fifth Circuit Court of Appeals. The appeal has now been fully briefed by the parties. No oral argument has been set. The Company continues to deny all allegations of wrongdoing, believes the plaintiffs' positions are without merit, and intends to vigorously defend itself against the appeal.

Two complaints alleging violations of federal securities laws and seeking certification as a class action were filed (on January 10, 2023, and March 13, 2023, respectively) against the Company and certain of its officers in the United States District Court for the Southern District of Texas in Houston. The complaints seek damages on behalf of a putative class of persons who purchased or otherwise acquired the Company's common stock between June 13, 2020, and December 31, 2022. The complaints assert claims under Sections 10(b) and 20 of the Exchange Act and allege that the Company made material misstatements to investors regarding the Company's internal technology and alleged vulnerability to large-scale flight disruptions. The complaints generally seek money damages, pre-judgment and post-judgment interest, and attorneys' fees and other costs. The deadline in the first of these two cases to file a motion seeking appointment of lead plaintiff was March 13, 2023; four separate motions were filed, and three of the parties seeking appointment contested the issue. On July 17, 2023, the Court signed an order consolidating the two federal securities cases into the first-filed suit and also appointed plaintiff Michael Berry as lead plaintiff in the consolidated case, with his counsel of record to serve as lead counsel and liaison counsel. On September 15, 2023, the lead plaintiff filed an amended complaint that expanded the class period to include persons who purchased or otherwise acquired the Company's common stock between February 4, 2020, and March 14, 2023, while continuing to assert claims under Sections 10(b) and 20 of the Exchange Act based on alleged misstatements regarding the Company's internal technology and alleged vulnerability to large-scale flight disruptions. On November 20, 2023, the Company and the individual defendants filed a motion to dismiss the amended complaint for failure to state a claim. Plaintiffs filed an opposition brief on January 26, 2024. The Company and the individual defendants filed a reply brief on February 23, 2024. On December 5, 2024, the United States District Court for the Southern District of Texas denied the motion to dismiss on the basis that "the issues are better suited for a summary judgment motion after the parties have had the opportunity to engage in discovery." On December 21, 2024, the Company moved for reconsideration of the December 5, 2024, order and, in the alternative, for permission to pursue an interlocutory appeal. The plaintiffs opposed both requests for relief. On April 3, 2025, the United States District Court for the Southern District of Texas conducted a hearing on the Company’s motion for reconsideration and requested the parties to confer and submit an agreed post-hearing briefing schedule in order for the Court to evaluate and determine the sufficiency of the allegations in Plaintiffs’ amended complaint in accordance with the Private Securities Litigation Reform Act. The parties' respective briefing on these issues has been completed and the matter remains pending for a decision by the Court. The Company denies all allegations of wrongdoing in the complaint, believes the plaintiffs' positions are without merit, and intends to vigorously defend itself in all respects.

Starting on or about January 24, 2023, the Company’s senior officers and the Board received multiple derivative demand letters from legal counsel for purported Southwest Shareholders demanding that the Board investigate claims, initiate legal action, and take remedial measures in connection with the service disruptions occurring in December 2022. Generally, the demand letters broadly assert that the Company’s directors and senior officers did not make sufficient investments in internal technology systems to prevent large-scale flight disruptions, did not exercise sufficient oversight over the Company’s operations, approved or received unwarranted compensation, caused the Company to make materially misleading public statements, and breached their fiduciary duties to the Company. Additionally, since January 27, 2023, the Company has received multiple letters from counsel for purported Southwest Shareholders making statutory demands for the production of various books and records of the Company, purportedly in an effort to investigate possible derivative claims similar to those made the subject of the derivative demands discussed above. On June 13, 2023, a shareholder derivative suit was filed against certain of the Company’s current and former officers and directors in the 14th Judicial District Court of Dallas County, Texas, asserting claims for damages from alleged breach of fiduciary duty, waste of corporate assets, and unjust enrichment derivatively on the Company’s behalf against the individual defendants based on similar factual allegations as contained in the demand letters and in the federal class action complaints. On June 15, 2023, a second shareholder derivative suit was filed against certain of the Company’s current and former officers and directors in the United States District Court for the Northern District of Texas, asserting claims under Section 14(a) of the Exchange Act

and for damages from alleged breach of fiduciary duty, indemnification, and unjust enrichment derivatively on the Company’s behalf against the individual defendants based on similar factual allegations as contained in the demand letters and in the federal class action complaints. On November 14, 2023, a third shareholder derivative suit was filed in the 134th Judicial District of Dallas County, Texas, by some of the same counsel involved in the June 13, 2023, suit against the same defendants in that suit and making allegations of the same operative facts and claims. On June 18, 2024, a fourth shareholder derivative suit was filed in the 101st Judicial District Court of Dallas County, Texas, asserting substantially similar claims as in the first two state court derivative suits. On June 26, 2024, a fifth shareholder derivative suit was filed in the United States District Court for the Northern District of Texas, asserting substantially similar claims as in the first federal derivative suit. On July 18, 2024, a sixth shareholder derivative suit was filed in the United States District Court for the Northern District of Texas, asserting substantially similar claims as in the first federal derivative suit (together with the previous demand letters and shareholder derivative suits, the “Derivative Actions and Demands”).

The Company and the Board have addressed the Derivative Actions and Demands in accordance with the applicable Texas statutes governing such demands and litigation. Pursuant to those statutes, a committee of independent and disinterested directors (the "Special Litigation Committee") was appointed to conduct an inquiry regarding the allegations in the Derivative Actions and Demands. The state court cases have been consolidated into one state court case, and the federal cases were later consolidated into one federal case.

As described above, pursuant to the applicable Texas statutes governing derivative demands and litigation, the Special Litigation Committee was duly appointed to conduct an inquiry regarding the claims and allegations asserted in the Derivative Actions and Demands. The Derivative Actions and Demands were all stayed, formally or by agreement, pending the outcome of the investigation by the Special Litigation Committee. On September 19, 2024, the Special Litigation Committee formally reported its findings and resolution concerning its investigation of the Derivative Actions and Demands, which began in July 2023 and concluded with the September 19, 2024 report and resolution, which in turn were delivered to the Company and its Board on September 23, 2024. The Special Litigation Committee retained two law firms to represent the Special Litigation Committee in connection with the Special Litigation Committee’s investigation of the Derivative Actions and Demands and the Special Litigation Committee’s review and assessment of evidence gathered in its investigation. The Special Litigation Committee further reported, among other details, upon its appointment, the independence and disinterestedness of its members, the Special Litigation Committee’s investigative processes, including meetings, scope of investigation, volume of documents reviewed, numbers of witnesses interviewed, other presentations received, review and analysis of evidence and applicable legal standards, work with its counsel, and findings and preparation of the final report and resolution of the Special Litigation Committee. Based upon the Special Litigation Committee report and the conclusions reached therein, the Special Litigation Committee, consistent with its appointment and delegated authority, unanimously adopted a resolution (i) determining that it is not in the best interests of the Company or its Shareholders to pursue the relief requested in the Derivative Actions and Demands; (ii) determining that it is in the best interests of the Company and its Shareholders to reject the Derivative Actions and Demands; (iii) determining that it is in the best interests of the Company and its Shareholders for the Company to move to dismiss the Derivative Actions and Demands; and (iv) instructing that the Company and counsel take all further actions necessary to implement the resolution. On December 26, 2024, the Board received a seventh demand letter, and on January 31, 2025, received an eighth demand letter, each containing allegations substantially similar to those presented in certain of the prior Derivative Actions and Demands, which are being addressed consistent with applicable Texas law governing such demands. On April 1, 2025, the Company filed a motion to dismiss or stay the consolidated state court derivative actions based on the forum selection clause in the Company’s bylaws and the pendency of the related federal derivative cases. In May 2025, the Company and the plaintiffs in the state court derivative actions filed a joint stipulation and proposed order to stay the state court derivative actions and, among other things, to make a ruling on a motion to dismiss in the federal derivative case binding upon the state court derivative actions. On June 18, 2025, the Company filed a motion to lift the stay in the consolidated federal derivative actions and an accompanying motion to dismiss based on the Special Litigation Committee's report, conclusions, and resolution. The parties have submitted to the Court a stipulation with a proposed schedule pertaining to further briefing and related proceedings in connection with the motion to dismiss. The stipulation has not yet been signed by the Court.

Based on the Company's wide-scale operational disruption, which led to the cancelation of a significant number of flights between December 21 and December 29, 2022, the Company has been subject to inquiries and investigations by governmental agencies (including with respect to a December 2023 settlement with the DOT) and could be

subject to fines and/or penalties resulting from those inquiries and investigations, as well as litigation from Customers and Shareholders.

On January 28, 2025, two participants in the Company’s retirement plans commenced a putative class action in the United States District Court for the Northern District of Texas against the Company, the Board, and certain of the Company’s officers. Plaintiffs purport to represent a class consisting of participants and beneficiaries in the Southwest Airlines Co. Retirement Savings Plan, the Southwest Airlines Co. 401(k) Plan, and the Southwest Airlines Co. ProfitSharing Plan (collectively, the “Plan”) who invested in the Harbor Capital Appreciation Fund from January 28, 2019 “through the date of judgment.” The complaint asserts that defendants mismanaged Plan assets and failed to monitor the Plan in violation of the Employee Retirement Income Security Act by, among other things, failing to remove the Harbor Fund as an investment option. The complaint seeks various forms of declaratory and monetary relief as well as attorneys’ fees, interest and other costs. The defendants deny all allegations of wrongdoing, believe the plaintiffs’ claims are without merit, and intend to vigorously defend against these claims.

On April 29, 2025, the Company received a demand letter addressed to the Board, dated April 28, 2025, from a purported Southwest Shareholder contending that the Company’s directors and senior officers breached their fiduciary duties in connection with the Board’s decision to end Southwest’s Bags Fly Free policy and to begin charging passengers for bags. The letter demanded that the Board investigate the circumstances surrounding the policy change and bring suit against individual directors and officers who allegedly breached their duties to the Company. On June 27, 2025, the Company sent a response to the demand letter on behalf of the Board rejecting the allegations and denying them and any other form of wrongdoing. The response letter also noted that the Board approved an amendment and restatement of the Company’s bylaws that, among other things, established a minimum ownership threshold of three percent of Southwest’s outstanding shares in order for a Southwest shareholder to institute or maintain a derivative proceeding, consistent with the provisions in Texas Senate Bill 29, which was signed into law on May 14, 2025. The response letter further noted that the purported shareholder who sent the demand letter claims to hold only 100 shares of the Company’s stock and thus fell well short of the three percent threshold. On July 10, 2025, the shareholder who sent the demand filed a shareholder derivative complaint in the United States District Court for the Northern District of Texas against various directors and officers of the Company based on the contentions asserted in the demand letter. The suit asserts, among other things, that the decision to change Southwest’s Bags Fly Free policy conflicts with the Company’s prior views regarding the policy and is detrimental to the Company’s business, and that the Company’s directors approved the policy to accede to pressure from large shareholder Elliott Investment Management L.P., to preserve their Board seats, or both, rather than to serve the Company’s interests. The complaint also asserts that the amendment and restatement of the Company’s bylaws is ineffective. On August 25, 2025, the Company and its Board moved to dismiss the derivative complaint and all claims on the grounds, among others, that the suit is barred by Texas Senate Bill 29 and the Company's bylaw passed pursuant thereto requiring a three percent ownership threshold in order for Company shareholders to bring derivative claims. The plaintiff opposed the motion, claiming the purportedly retroactive application of Texas Senate Bill 29 and the Company bylaw are unconstitutional; and the Company filed a reply in support of its motion to dismiss. Additionally, multiple entities sought and were granted leave to file three separate amicus curiae briefs in support of the Company's motion to dismiss and Texas Senate Bill 29; those included one amicus brief each by: (i) the Chamber of Commerce of the United States of America and the Texas Association of Business, (ii) the Alliance for Corporate Excellence, and (iii) Texans for Lawsuit Reform. Finally, in light of the constitutional challenge to Texas Senate Bill 29, on October 3, 2025, the State of Texas, represented by the Office of the Attorney General of Texas, filed a motion to intervene in the case and its own accompanying motion to dismiss the plaintiff's derivative suit and all claims therein as barred by Texas Senate Bill 29. The State of Texas’s motion to intervene was granted, and its motion to dismiss has been fully briefed by both the State and the plaintiff. The motions to dismiss of both the Company and the State of Texas remain pending and awaiting decision by the Court. The Company and its Board deny all allegations of wrongdoing, believe the plaintiffs' positions are without merit, and intend to vigorously defend themselves in all respects.

The Company is from time to time subject to various legal proceedings and claims arising in the ordinary course of business, including, but not limited to, examinations by the Internal Revenue Service and state and local income tax authorities.

The Company’s management does not expect that the outcome in any of its currently ongoing legal proceedings or the outcome of any proposed adjustments presented to date by the Internal Revenue Service and state and local

income tax authorities, individually or collectively, will have a material adverse effect on the Company’s financial condition, results of operations, or cash flow. Nevertheless, an adverse outcome for any of these matters could be material.

Not applicable.

INFORMATION ABOUT OUR EXECUTIVE OFFICERS

The following information regarding the Company’s executive officers is as of February 5, 2026.

Set forth below is a description of the background of each of the Company’s executive officers.

Robert E. Jordan has served as the Company's Chief Executive Officer since February 2022 and as its President since January 2023. Mr. Jordan has been a member of the Board since February 2022. Mr. Jordan also served as Executive Vice President & Incoming Chief Executive Officer from June 2021 to February 2022, Executive Vice President Corporate Services from July 2017 to June 2021, Executive Vice President & Chief Commercial Officer from September 2011 to July 2017, Executive Vice President Strategy & Planning from May 2008 to September 2011, Executive Vice President Strategy & Technology from September 2006 to May 2008, Senior Vice President Enterprise Spend Management from August 2004 to September 2006, Vice President Technology from 2002 to 2004, Vice President Purchasing from 2001 to 2002, Controller from 1997 to 2001, Director Revenue Accounting from 1994 to 1997, and Manager Sales Accounting from 1990 to 1994. Mr. Jordan joined the Company in 1988 as a programmer.

Andrew M. Watterson has served as the Company's Chief Operating Officer since October 2022. Mr. Watterson also served as Executive Vice President & Chief Commercial Officer from January 2020 to October 2022, Executive Vice President & Chief Revenue Officer from July 2017 to January 2020, Senior Vice President & Chief Revenue Officer from January 2017 to July 2017, Senior Vice President of Network & Revenue from January 2016 to January 2017, and as Vice President of Network Planning & Performance from October 2013 to January 2016.

Tom Doxey has served as the Company’s Executive Vice President & Chief Financial Officer since March 2025. Mr. Doxey also served as President of Breeze Airways from May 2022 to August 2024, Senior Vice President of Technical Operations at United Airlines from May 2019 to April 2022, Chief Financial Officer of Operations at United Airlines from December 2016 to May 2019, Vice President of Fleet and Corporate Finance at Allegiant Air from March 2013 to December 2016, in other fleet and finance-related roles at Allegiant Air from July 2009 to March 2013, and in various Finance roles at US Airways from October 2006 to July 2009.

Justin Jones has served as the Company’s Executive Vice President Operations since December 2023. Mr. Jones also served as Senior Vice President Operations & Design from December 2021 to December 2023, Vice President Planning & Performance, Technical Operations from September 2018 to December 2021, Vice President Operational Strategy & Performance from March 2016 to September 2018, Senior Director Pricing & Planning from October 2012 to March 2016, and Director Revenue Management from November 2008 to October 2012. Mr. Jones joined the Company in 2001 in the Revenue Management Department.

Tony Roach has served as the Company's Executive Vice President & Chief Customer & Brand Officer since March 2025. Mr. Roach also served as Senior Vice President & Chief Customer Officer from December 2022 to March 2025, Vice President Customer Experience & Customer Relations from May 2021 to December 2022, Managing Director Customer Experience from June 2020 to May 2021, Managing Director Marketing from September 2019 to June 2020, Senior Director Customer Experience from September 2018 to September 2019, Director Customer Experience from January 2017 to September 2018, Senior Manager in the Marketing Department from February 2014 to January 2017, and Manager in the Marketing Department from December 2010 to February 2014. Mr. Roach joined the Company in 2001 in the Marketing Department.

Lauren Woods has served as the Company’s Executive Vice President & Chief Information Officer since December 2025. Ms. Woods also served as Senior Vice President & Chief Information Officer from February 2023 to December 2025, Vice President Technology from August 2021 to February 2023, Managing Director Technology from February 2019 to August 2021, Senior Director Technology from April 2016 to February 2019, Director in the Corporate Delivery Department from November 2014 to April 2016, Senior Manager Technology from October 2012 to November 2014, and Manager Technology from March 2010 to October 2012.

PART II

The Company’s common stock is listed on the New York Stock Exchange ("NYSE") and is traded under the symbol "LUV." The Company currently intends to continue declaring dividends on a quarterly basis for the foreseeable future; however, the Board may elect to alter the timing, amount, and payment of dividends on the basis of operational results, financial condition, cash requirements, future prospects, and other factors deemed relevant by the Board. As of February 3, 2026, there were approximately 10,253 holders of record of the Company’s common stock.

Stock Performance Graph

The following Performance Graph and related information shall not be deemed "soliciting material" or "filed" with the Securities and Exchange Commission, nor shall such information be incorporated by reference into any future filing under the Securities Act of 1933 or Securities Exchange Act of 1934.

The following graph compares the cumulative total Shareholder return on the Company’s common stock over the five-year period ended December 31, 2025, with the cumulative total return during such period of the Standard and Poor’s 500 Stock Index and the NYSE ARCA Airline Index. The comparison assumes $100 was invested on December 31, 2020, in the Company’s common stock and in each of the foregoing indices and assumes reinvestment of dividends. The stock performance shown on the graph below represents historical stock performance and is not necessarily indicative of future stock price performance.

COMPARISON OF FIVE YEAR CUMULATIVE TOTAL RETURN AMONG SOUTHWEST AIRLINES CO., S&P 500 INDEX, AND NYSE ARCA AIRLINE INDEX

Issuer Repurchases

(1) On September 25, 2024, the Board authorized the repurchase of up to $2.5 billion of the Company’s common stock, of which no amounts remained as of the end of second quarter 2025. On July 23, 2025, the Board approved a $2.0 billion share repurchase authorization of the Company's common stock. Subject to certain conditions, repurchases may be made in accordance with applicable securities laws in open market or private, including accelerated, repurchase transactions from time to time, depending on market conditions.

(2) Excludes immaterial amount of excise tax on share repurchases, net of issuances.

(3) Under an accelerated share repurchase program entered into by the Company with a third-party financial institution in third quarter 2025 (the "Third Quarter 2025 ASR Program"), the Company paid $250 million and received an initial delivery of 6,368,213 shares during September 2025, representing an estimated 80 percent of the shares to be purchased by the Company under the Third Quarter 2025 ASR Program. This share amount was based on the $31.39 and $31.43 closing price of the Company's common stock on September 5, 2025 and September 15, 2025, respectively. Upon settlement, the third-party financial institution delivered 1,409,551 additional shares of the Company’s common stock to the Company in October 2025 based on a discount to the volume-weighted average price per share of the Company's common stock during the calculation period. Upon completion of the Third Quarter 2025 ASR Program in October 2025, the average purchase price per share for the 7,777,764 shares repurchased was $32.14.

(4) Under an accelerated share repurchase program entered into by the Company with a third party financial institution in fourth quarter 2025 (the "Fourth Quarter 2025 ASR Program"), the Company paid $50 million and received an initial delivery of 1,224,740 shares during November 2025, representing an estimated 80 percent of the shares to be purchased by the Company under the Fourth Quarter 2025 ASR Program. This share amount was based on the $32.66 closing price of the Company's common stock on November 10, 2025. Final settlement of the Fourth Quarter 2025 ASR Program occurred in December 2025 and was based on a discount to the volume-weighted average price per share of the Company's common stock during a calculation period completed in December 2025. Upon settlement, the third party financial institution delivered 106,178 additional shares of the Company’s common stock to the Company. Upon completion of the Fourth Quarter 2025 ASR Program in December 2025, the average purchase price per share for the 1,330,918 shares repurchased was $37.57.

(5) In addition, under a forward contract entered into by the Company in December 2025, the Company committed $750 million for an accelerated share repurchase program with a third party financial institution (the “January 2026 ASR Program”) under which the Company paid $750 million in January 2026 and received total delivery of 17,965,193 shares as settlement in full. Upon completion of the January 2026 ASR Program in January 2026, the average purchase price per share of the 17,965,193 shares repurchased was $41.75. The $750 million paid in January correspondingly reduced the maximum dollar value of shares that may yet be purchased under the repurchase program to $950 million.

(6) Under an accelerated share repurchase program entered into by the Company with a third party financial institution in January 2026 (the "First Quarter 2026 ASR Program"), the Company paid $400 million and received an initial delivery of 6,597,939 shares during January 2026, representing an estimated 80 percent of the shares to be purchased by the Company under the First Quarter 2026 ASR Program. This share amount was based on the $48.50 closing price of the Company's

common stock on January 29, 2026. Final settlement of the First Quarter 2026 ASR program is scheduled to occur by the end of April 2026 and will be based on a discount to the volume-weighted average price per share of the Company's common stock during a calculation period to be completed at time of settlement. The $400 million paid in first quarter 2026 correspondingly reduced the maximum dollar value of shares that may yet be purchased under the repurchase program to $550 million.

YEAR IN REVIEW

The Company had a record full year revenue performance in 2025, producing operating revenues of $28.1 billion, due in part to continued strong domestic travel demand, as well as the execution of transformational initiatives, which has resulted in strong financial performance and driven incremental Shareholder value.

The Company recorded results for 2025 and 2024, on an accounting principles generally accepted in the United States ("GAAP") and non-GAAP basis, as noted in the following tables. See Note Regarding Use of Non-GAAP Financial Measures and the Reconciliation of Reported Amounts to Non-GAAP Financial Measures for additional detail regarding non-GAAP financial measures.

The Company's operating income, as shown above on a GAAP and non-GAAP basis for the year ended December 31, 2025, increased compared to the same prior year period primarily driven by revenue initiatives, including the Company's policy change related to certain Customers' first and second checked bags that became effective May 28, 2025. This increase was combined with outperformance of cost reduction goals and lower year-over-year Fuel and oil expense primarily driven by lower jet fuel prices, partially offset by higher salaries, wages, and benefits expense. Despite the negative impacts to bookings and travel associated with the government shutdown during a portion of fourth quarter 2025, the Company earned an outsized portion of its 2025 operating income during the period. On a GAAP basis, the Company achieved in excess of 90 percent, and on a non-GAAP basis, achieved in excess of 70 percent, of its annual operating income during the fourth quarter of the year, both primarily as a result of the ramp-up of its transformational and revenue initiatives over the course of the year. The Company's net income, as shown above on a GAAP and non-GAAP basis for the year ended December 31, 2025, decreased compared to the same prior year period primarily due to a decrease in interest income driven by a lower cash and investment balance. Additionally, on a GAAP basis, the Company’s results for the year ended December 31, 2024, included a reversal of $116 million of breakage revenue recorded in prior years related to a portion of flight credits issued to Customers during 2022 and prior that either were redeemed or are expected to be redeemed in future periods. The majority of these flight credits were issued during the COVID-19 pandemic as the Company was making significant changes to its flight schedules based on fluctuating demand. This adjustment was treated as a special item and excluded from the Company's presentation of non-GAAP results. See Note Regarding Use of Non-GAAP Financial Measures and the Reconciliation of Reported Amounts to Non-GAAP Financial Measures for additional detail regarding non-GAAP financial measures.

Operating Statistics

The Company provides the operating data below for the years ended December 31, 2025 and 2024 because these statistics are commonly used in the airline industry and, therefore, allow readers to compare the Company’s performance against its results for the prior year period, as well as against the performance of the Company’s peers.

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The Company has at times had interest rate risk in its floating-rate debt obligations and interest rate swaps, commodity price risk in jet fuel required to operate its aircraft fleet, and market risk in the derivatives used to manage its fuel hedging program and in the form of fixed-rate debt instruments. As of December 31, 2025, the Company also operated a total of 97 aircraft under operating and finance leases. The Company previously operated a small number of aircraft that had lease payments that fluctuated based in part on changes in market interest rates. The last fluctuating lease expired in July 2025. Therefore, the Company's leases are not considered market sensitive financial instruments and, therefore, are not included in the interest rate sensitivity analysis below. The Company does not purchase or hold any derivative financial instruments for trading purposes. See Note 10 to the Consolidated Financial Statements for information on the Company’s financial derivative instruments.

Hedging and Aircraft Fuel Risk

Changes in fuel prices could materially affect the Company’s results of operations. As discussed in Note 10 to the Consolidated Financial Statements, the Company discontinued its fuel hedging program in 2025. During second quarter 2025, the Company terminated its remaining portfolio of fuel hedging contracts, which were scheduled to settle through 2027, to effectively close its fuel hedging portfolio and program. Consequently, the Company is fully exposed to fluctuations in fuel prices like most of its competitors. The Company currently expects to consume approximately 2.2 billion gallons of jet fuel in 2026. Based on this anticipated usage, a change in jet fuel prices of one cent per gallon would impact the Company’s Fuel and oil expense by approximately $22 million for 2026.

The fair values of the derivative instruments held in prior periods, depending on the type of instrument, were determined by use of present value methods or standard option value models with assumptions about commodity prices based on those observed in underlying markets. The Company’s credit exposure related to derivative instruments in prior periods was represented by the fair value of contracts that were in an asset position to the Company. At such times, these outstanding instruments exposed the Company to credit loss in the event of nonperformance by the counterparties to the agreements.

The Company has agreements with a majority of its counterparties associated with its outstanding interest rate swap agreements in which cash collateral may be required based on the fair value of outstanding derivative instruments, as well as the Company’s and its counterparties' credit ratings. As of December 31, 2025, no cash collateral deposits were provided by or held by the Company based on its outstanding interest rate swap agreements.

Financial Market Risk

The vast majority of the Company’s tangible assets are aircraft, which are long-lived. The Company’s long-term strategy is to maintain an investment grade balance sheet and generate adequate profits and returns on capital, while growing capacity steadily under the right conditions. While the Company uses financial leverage, it strives to maintain a strong and efficient balance sheet and has investment grade credit ratings with all three major credit rating agencies as of December 31, 2025. See Note 6 to the Consolidated Financial Statements for more information on the material terms of the Company’s short-term and long-term debt.

All the Company's senior unsecured notes outstanding as of December 31, 2025 were issued as fixed-rate obligations. See Note 6 to the Consolidated Financial Statements for further information.

During fourth quarter 2025, the Company entered into interest rate swap agreements as a hedge related to its $750 million 5.25% Notes due 2035. The primary objective for the Company's use of this interest rate hedge was to hedge against changes in the fair value of the debt instrument caused by changes in market interest rates, specifically SOFR. The hedge strategy is to eliminate the changes in fair value of the debt by converting the fixed rate interest of the debt to a floating rate. Under these interest rate swap agreements, the Company pays SOFR plus a margin every six months on the notional amount of the debt, and receives payments based on the fixed stated rate of the notes every six months until the date the notes become due. These interest rate swap agreements collectively qualify as a fair value hedge. As a result of the fixed-to-floating interest rate swap agreements in place, the average floating rate recognized during 2025 was approximately 5.44 percent, based on actual and forward rates as of December 31, 2025.

The $100 million 7.375% debentures due 2027 had at one point been converted to a floating rate, but the Company subsequently terminated the fixed-to-floating interest rate swap agreements related to it. The effect of this termination was that the interest associated with this debt prospectively reverted back to its original fixed rate. As a result of the gain realized on this transaction, which is being amortized over the remaining term of the corresponding notes, and based on projected interest rates at the date of termination, the Company does not believe its future interest expense, based on projected future interest rates at the date of termination, associated with these notes will significantly differ from the expense it would have recorded had the notes remained at floating rates.

During fourth quarter 2023, the Company terminated $150 million notional value of forward-starting interest rate swap agreements associated with the Company's forecasted issuance of debt. These swap agreements had been classified as cash flow hedges, and all fair market value changes were recorded to AOCI prior to their termination. Following the issuance of the Company's $750 million 5.25% Notes due 2035 in fourth quarter 2025, the deferred gain of $23 million associated with these terminated swaps is now being amortized as a reduction to Interest expense over the life of the notes. See Note 10 to the Consolidated Financial Statements for further information.

The Company's total debt divided by total assets was 16.9 percent as of December 31, 2025.

The Company also has some risk associated with changing interest rates due to the short-term nature of its invested cash, which totaled $3.2 billion, as of December 31, 2025. See Notes 1 and 11 to the Consolidated Financial Statements for further information. The Company currently invests available cash in time deposits, highly rated money market instruments, and other highly rated financial instruments, depending on market conditions and operating cash requirements. Because of the short-term nature of these investments, the returns earned parallel closely with short-term floating interest rates. The Company has not undertaken any additional actions to cover interest rate market risk and is not a party to any other material market interest rate risk management activities.

A hypothetical 10 percent change in market interest rates as of December 31, 2025, would have resulted in an approximate $32 million change in the fair value of the Company’s fixed-rate debt instruments. See Note 11 to the Consolidated Financial Statements for further information on the fair value of financial instruments. A change in market interest rates could, however, have a corresponding effect on earnings and cash flows associated with the Company’s debt that has been converted to a floating interest rate and invested cash (excluding cash collateral deposits held, if applicable) because of the floating-rate nature of these items. Assuming floating market rates in effect as of December 31, 2025, were held constant throughout a 12-month period, a hypothetical 10 percent change in those rates would have resulted in an immaterial impact on the Company’s net earnings and cash flows. Utilizing these assumptions and considering the Company’s cash balance (excluding the impact of cash collateral deposits held from or provided to counterparties, if applicable) and floating-rate debt outstanding as of December 31, 2025, an increase in rates would have a net positive effect on the Company’s earnings and cash flows, while a decrease in rates would have a net negative effect on the Company’s earnings and cash flows. However, a hypothetical 10 percent change in market rates would not impact the Company’s earnings or cash flow associated with the Company’s publicly traded fixed-rate debt.

The Company is also subject to a financial covenant included in its Amended Credit Agreement, and is subject to credit rating triggers related to its credit card transaction processing agreements, the pricing related to any funds drawn under its Amended Credit Agreement, and some of its hedging counterparty agreements. Certain covenants include the maintenance of minimum credit ratings and/or triggers that are based on changes in these ratings. The Company’s Amended Credit Agreement contains a financial covenant to maintain a Coverage Ratio (as defined therein) of 1.25 to 1.00, subject to the Company's one-time option to reduce this ratio requirement to 0.80 to 1.00 for two consecutive fiscal quarters. As of December 31, 2025, the Company was in compliance with this covenant and there were no amounts outstanding under the Amended Credit Agreement. However, if conditions change and the Company fails to meet the minimum standards set forth in the Amended Credit Agreement, there could be a reduction in the availability of cash under the facility, or an increase in the costs to keep the facility intact as written. The Company’s hedging counterparty agreements contain ratings triggers in which cash collateral could be required to be posted with the counterparty if the Company’s credit rating were to fall below investment grade by two of the three major rating agencies, and if the Company were in a net liability position with the counterparty. See Note 10 to the Consolidated Financial Statements for further information.

The Company currently has agreements with organizations that process credit card transactions arising from purchases of air travel tickets by its Customers utilizing American Express, Discover, and MasterCard/VISA. Credit card processors have financial risk associated with tickets purchased for air travel because the processor generally forwards the cash related to the purchase to the Company soon after the purchase is completed, but the air travel generally occurs after that time; therefore, the processor will have liability if the Company does not ultimately provide the air travel. Under these processing agreements, and based on specified conditions, increasing amounts of cash reserves could be required to be posted with the counterparty. There was no cash reserved for this purpose as of December 31, 2025.

A majority of the Company’s sales transactions are processed by Chase Paymentech. Should Customer chargebacks processed by Chase Paymentech reach a certain level, cash proceeds from advance ticket sales could be held back and used to establish a reserve account to cover such chargebacks and any other Customer-disputed charges that might occur. Additionally, cash reserves are required to be established if the Company’s credit rating falls to specified levels below investment grade. Cash reserve requirements are based on the Company’s public debt rating and a corresponding percentage of the Company’s Air traffic liability. As of December 31, 2025, no cash holdbacks were in place.

As of December 31, 2025, the Company was in compliance with all credit card processing agreements. The inability to enter into credit card processing agreements would have a material adverse effect on the business of the Company. The Company believes that it will be able to continue to renew its existing credit card processing agreements or will be able to enter into new credit card processing agreements with other processors in the future.

Southwest Airlines Co.

Consolidated Balance Sheet

(in millions, except share data)

See accompanying notes.

Southwest Airlines Co.

Consolidated Statement of Income

(in millions, except per share amounts)

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None.

Evaluation of Disclosure Controls and Procedures. The Company maintains disclosure controls and procedures (as defined in Rule 13a-15(e) of the Securities Exchange Act (the “Exchange Act”)) designed to provide reasonable assurance that the information required to be disclosed by the Company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified in the SEC’s rules and forms. These include controls and procedures designed to ensure that this information is accumulated and communicated to the Company’s management, including its Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure. Management, with the participation of the Company’s Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of the Company’s disclosure controls and procedures as of December 31, 2025. Based on this evaluation, the Company’s Chief Executive Officer and Chief Financial Officer have concluded that the Company’s disclosure controls and procedures were effective as of December 31, 2025, at the reasonable assurance level.

Management’s Annual Report on Internal Control over Financial Reporting. Management of the Company is responsible for establishing and maintaining adequate internal control over financial reporting (as defined in Rule 13a-15(f) of the Exchange Act). The Company’s internal control over financial reporting is a process, under the supervision of the Company’s Chief Executive Officer and Chief Financial Officer, designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with accounting principles generally accepted in the United States.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Therefore, even those systems determined to be effective can provide only reasonable assurance of achieving their control objectives.

Management, with the participation of the Company’s Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of the Company’s internal control over financial reporting as of December 31, 2025. In making this assessment, management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control - Integrated Framework (2013 Framework). Based on this evaluation, management, with the participation of the Company’s Chief Executive Officer and Chief Financial Officer, concluded that, as of December 31, 2025, the Company’s internal control over financial reporting was effective.

Ernst & Young LLP, the independent registered public accounting firm who audited the Company’s Consolidated Financial Statements included in this Form 10-K, has issued an attestation report on the Company’s internal control over financial reporting, which is included herein.

Changes in Internal Control over Financial Reporting. There were no changes in the Company’s internal control over financial reporting (as defined in Rule 13a-15(f) of the Exchange Act) during the quarter ended December 31, 2025, that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

None.

Not applicable.

PART III

Directors and Executive Officers

The information required by this Item 10 regarding the Company’s directors will be set forth under the heading “Proposal 1 - Election of Directors” in the Proxy Statement for the Company’s 2026 Annual Meeting of Shareholders and is incorporated herein by reference. The information required by this Item 10 regarding the Company’s executive officers is set forth under the heading “Information about our Executive Officers” in Part I of this Form 10-K and is incorporated herein by reference.

Section 16(a) Compliance

If applicable, the information required by this Item 10 regarding compliance with Section 16(a) of the Exchange Act will be set forth under the heading “Delinquent Section 16(a) Reports” in the Proxy Statement for the Company’s 2026 Annual Meeting of Shareholders and is incorporated herein by reference.

Corporate Governance

Except as set forth in the following paragraph, the remaining information required by this Item 10 will be set forth under the heading “Corporate Governance” in the Proxy Statement for the Company’s 2026 Annual Meeting of Shareholders and is incorporated herein by reference.

The Company has adopted a Code of Ethics that applies to its principal executive officer, principal financial officer, and principal accounting officer or controller. The Company’s Code of Ethics, as well as its Corporate Governance Guidelines and the charters of its Audit, Compensation, and Nominating and Corporate Governance Committees, are available on the Company’s website, www.southwest.com. Copies of these documents are also available upon request to Investor Relations, Southwest Airlines Co., P.O. Box 36611, Dallas, TX 75235. The Company intends to disclose any amendments to, or waivers from, its Code of Ethics that apply to the Company’s principal executive officer, principal financial officer, and principal accounting officer or controller on the Company’s website, www.southwest.com, under the “About Southwest” caption, promptly following the date of any such amendment or waiver.

The information required by this Item 11 will be set forth under the headings “Compensation of Executive Officers” and “Compensation of Directors” in the Proxy Statement for the Company’s 2026 Annual Meeting of Shareholders and is incorporated herein by reference.

Except as set forth below regarding securities authorized for issuance under equity compensation plans, the information required by this Item 12 will be set forth under the heading “Voting Securities and Principal Shareholders” in the Proxy Statement for the Company’s 2026 Annual Meeting of Shareholders and is incorporated herein by reference.

Securities Authorized for Issuance under Equity Compensation Plans

The following table provides information as of December 31, 2025, regarding compensation plans under which equity securities of the Company are authorized for issuance.

Equity Compensation Plan Information

(1)Restricted share units settleable in shares of the Company’s common stock.

(2)Restricted share units discussed in footnote (1) above do not have a weighted average exercise price because the restricted share units do not have an exercise price upon vesting.

(3) Of these shares, (i) 12,126,078 shares remained available for issuance under the Company’s tax-qualified employee stock purchase plan; and (ii) 9,201,349 shares remained available for issuance under the Company’s 2007 Equity Incentive Plan in connection with the exercise of stock options and stock appreciation rights, the settlement of awards of restricted stock, restricted stock units, and phantom shares, and the grant of unrestricted shares of common stock; however, no more than 1,258,442 shares remain available for grant in connection with awards of unrestricted shares of common stock, stock-settled phantom shares, and awards to non-Employee members of the Board. These shares are in addition to the shares reserved for issuance pursuant to outstanding awards included in column (a).

See Note 9 to the Consolidated Financial Statements for information regarding the material features of the above plans. Each of the above plans provides that the number of shares with respect to which options may be granted, the number of shares of common stock subject to an outstanding option, and the number of restricted share units granted shall be proportionately adjusted in the event of a subdivision or consolidation of shares or the payment of a stock dividend on common stock, and the purchase price per share of outstanding options shall be proportionately revised.

The information required by this Item 13 will be set forth under the heading “Certain Relationships and Related Transactions, and Director Independence” in the Proxy Statement for the Company’s 2026 Annual Meeting of Shareholders and is incorporated herein by reference.

The Company's independent registered public accounting firm is Ernst & Young LLP, Dallas, TX, Auditor Firm ID: 42.

The information required by this Item 14 will be set forth under the heading “Relationship with Independent Auditors” in the Proxy Statement for the Company’s 2026 Annual Meeting of Shareholders and is incorporated herein by reference.

PART IV

(a) 1. Financial Statements:

The financial statements included in Item 8. Financial Statements and Supplementary Data above are filed as part of this annual report.

2. Financial Statement Schedules:

There are no financial statement schedules filed as part of this annual report, since the required information is included in the Consolidated Financial Statements, including the notes thereto, or the circumstances requiring inclusion of such schedules are not present.

3. Exhibits:

(1)Certain confidential information contained in this agreement has been omitted because it is both not material and is of the type that the registrant treats as private or confidential.

(2)Management contract or compensatory plan or arrangement.

(3)This exhibit is being furnished rather than filed and shall not be deemed incorporated by reference into any filing, in accordance with Item 601 of Regulation S-K.

A copy of each exhibit may be obtained at a price of 15 cents per page, $10.00 minimum order, by writing to: Investor Relations, Southwest Airlines Co., P.O. Box 36611, Dallas, Texas 75235-1611.

None.

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on February 5, 2026, on behalf of the registrant and in the capacities indicated.