Item 2. PROPERTIES.

Fleet. As of December 31, 2020, United's mainline and regional fleets consisted of the following:

In addition to the aircraft presented in the table above, United owned or leased, as of December 31, 2020, eleven Boeing 757-200s, three Airbus A319s, three Airbus A320s and one Boeing 767-200 that are not used in its operations.

In addition to the aircraft presented in the table above, United owned or leased the following regional aircraft as of December 31, 2020:

• Four Embraer E175LLs, which were delivered but not yet in service;

• 119 Embraer ERJ 145s currently in storage with several aircraft scheduled to be inducted into CommutAir's fleet throughout 2021 and 2022; and

• 12 CRJ700s that are being transitioned between CPAs and for which United continues to make monthly payments.

Firm Order and Option Aircraft. As of December 31, 2020 (adjusted to include the effects of the February 26, 2021 agreement with Boeing discussed below), United had firm commitments and options to purchase new aircraft from Boeing, Airbus and Embraer as presented in the table below:

(a) United also has options and purchase rights for additional aircraft.

On February 26, 2021, the Company entered into an agreement with The Boeing Company ("Boeing") for a firm order of 25 Boeing 737 MAX aircraft for delivery in 2023, and to reschedule the delivery of 40 previously ordered Boeing 737 MAX aircraft to 2022 and 5 Boeing 737 MAX aircraft into 2023.

The aircraft listed in the table above are scheduled for delivery through 2030. To the extent the Company and the aircraft manufacturers with which the Company has existing orders for new aircraft agree to modify the contracts governing those orders, the amount and timing of the Company's future capital commitments could change. United also has an agreement to purchase 11 used Boeing 737-700 aircraft with expected delivery dates in 2021. In addition, United has an agreement to purchase 17 used Airbus A319 aircraft, which it intends to sell, with expected delivery dates in 2021 and 2022.

See Notes 10 and 13 to the financial statements included in Part II, Item 8 of this report for additional information.

Facilities. United leases gates, hangar sites, terminal buildings and other airport facilities in the municipalities it serves. United has major terminal facility leases at SFO, Washington Dulles, Chicago O'Hare, LAX, Denver, Newark, Houston Bush and Guam with expiration dates ranging from 2021 through 2053. Substantially all of these facilities are leased on a net-rental basis, resulting in the Company's responsibility for maintenance, insurance and other facility-related expenses and services.

United also maintains administrative, catering, cargo, training, maintenance and other facilities to support its operations in the cities it serves. In addition, United has multiple leases, which expire from 2030 through 2033, for its principal executive office and operations center in downtown Chicago and administrative offices in downtown Houston.