Item 6. EXHIBITS

(a) Exhibits

10.1 Amendment No. 4 dated August 20, 2021 to Airbus A321 NEO Aircraft Purchase Agreement, dated as of December 15, 2017 between Airbus S.A.S. and Delta Air Lines, Inc. (“Amendment No. 4”)*

10.2 Amended and Restated Letter Agreements No. 3 related to Amendment No. 4 dated August 20, 2021*

15 Letter from Ernst & Young LLP regarding unaudited interim financial information

31.1 Certification by Delta's Chief Executive Officer with respect to Delta's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2021

31.2 Certification by Delta's Chief Financial Officer with respect to Delta's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2021

32 Certification pursuant to Section 1350 of Chapter 63 of Title 18 of the United States Code by Delta's Chief Executive Officer and Chief Financial Officer with respect to Delta's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2021

101.INS Inline XBRL Instance Document - The instance document does not appear in the interactive data file because its XBRL tags are embedded within the Inline XBRL document.

101.SCH Inline XBRL Taxonomy Extension Schema Document

101.CAL Inline XBRL Taxonomy Extension Calculation Linkbase Document

101.DEF Inline XBRL Taxonomy Extension Definition Linkbase Document

101.LAB Inline XBRL Taxonomy Extension Labels Linkbase Document

101.PRE Inline XBRL Taxonomy Extension Presentation Linkbase Document

104 The cover page from this Quarterly Report on Form 10-Q for the quarter ended September 30, 2021, formatted in Inline XBRL (included in Exhibit 101)

• Portions of this exhibit have been redacted pursuant to item 601(b)(10)(iv) of Regulation S-K.

Delta Air Lines, Inc. September 2021 Form 10-Q 46

SIGNATURE

Pursuant to the requirements 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.

Delta Air Lines, Inc. September 2021 Form 10-Q 47