DAL

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (date of earliest event reported): January 12, 2026

DELTA AIR LINES, INC.

(Exact name of registrant as specified in its charter)

Delaware 001-05424 58-0218548

(State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.)

Post Office Box 20706 Atlanta, Georgia 30320-6001

(Address of principal executive offices and zip code)

Registrant's telephone number, including area code: (404) 715-2600

Registrant's Web site address: www.delta.com

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (See General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class Trading Symbol Name of each exchange on which registered

Common Stock, par value $0.0001 per shareDALNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR 240.12b-2).

Emerging growth company    ☐

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. ☐

Item 1.01    Entry into a Material Definitive Agreement

On January 12, 2026, Delta Air Lines, Inc. (“Delta”) entered into a definitive agreement with The Boeing Company to acquire 30 Boeing 787-10 aircraft, with an option to purchase up to an additional 30 of the same aircraft. The 787-10 aircraft will include GEnx engines manufactured by General Electric. Deliveries of the 787-10 aircraft will begin in 2031. The order for the aircraft is within Delta’s previously announced capital expenditure and capacity targets. Delta has obtained long-term financing for a substantial portion of the purchase price of each aircraft.

Item 2.02    Results of Operations and Financial Condition

Delta today issued a press release reporting financial results for the quarter ended December 31, 2025 and full year 2025. The press release is furnished as Exhibit 99.1 to this Form 8-K. In addition, a summary containing supplemental information is being furnished as Exhibit 99.2 to this Form 8-K.

The information furnished in this Form 8-K, including Exhibits 99.1 and 99.2 attached hereto, shall not be deemed incorporated by reference into any other filing with the Securities and Exchange Commission.

Item 9.01    Financial Statements and Exhibits

(d) Exhibits.

Exhibit 99.1Press Release dated January 13, 2026 titled "Delta Air Lines Announces December Quarter and Full Year 2025 Financial Results"

Exhibit 99.2Supplemental Information

Exhibit 104 The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

Forward Looking Statements

Statements made in this Form 8-K that are not historical facts, including statements regarding our estimates, expectations, beliefs, intentions, projections, goals, aspirations, commitments or strategies for the future, should be considered “forward-looking statements” under the Securities Act of 1933 , as amended, the Securities Exchange Act of 1934 , as amended, and the Private Securities Litigation Reform Act of 1995. Such statements are not guarantees or promised outcomes and should not be construed as such. All forward-looking statements involve a number of risks and uncertainties that could cause actual results to differ materially from the estimates, expectations, beliefs, intentions, projections, goals, aspirations, commitments and strategies reflected in or suggested by the forward-looking statements. These risks and uncertainties include, but are not limited to, the possible effects of serious accidents involving our aircraft or aircraft of our airline partners; breaches or lapses in the security of technology systems we use and rely on, which could compromise the data stored within them, as well as failure to comply with evolving global privacy and security regulatory obligations or adequately address increasing customer focus on privacy issues and data security; disruptions in our information technology infrastructure; our dependence on technol

dal-202510090000027904false00000279042025-10-092025-10-09

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (date of earliest event reported): October 9, 2025

DELTA AIR LINES, INC.

(Exact name of registrant as specified in its charter)

Delaware 001-05424 58-0218548

(State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.)

Post Office Box 20706 Atlanta, Georgia 30320-6001

(Address of principal executive offices and zip code)

Registrant's telephone number, including area code: (404) 715-2600

Registrant's Web site address: www.delta.com

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (See General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class Trading Symbol Name of each exchange on which registered

Common Stock, par value $0.0001 per shareDALNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR 240.12b-2).

Emerging growth company    ☐

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. ☐

Item 2.02    Results of Operations and Financial Condition

Delta Air Lines, Inc. today issued a press release reporting financial results for the quarter ended September 30, 2025. The press release is furnished as Exhibit 99.1 to this Form 8-K.

The information furnished in this Form 8-K, including Exhibit 99.1 attached hereto, shall not be deemed incorporated by reference into any other filing with the Securities and Exchange Commission.

Item 9.01    Financial Statements and Exhibits

(d) Exhibits.

Exhibit 99.1Press Release dated October 9, 2025 titled "Delta Air Lines Announces September Quarter 2025 Financial Results"

Exhibit 104 The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURES

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 hereunto duly authorized.

DELTA AIR LINES, INC.

By: /s/ Daniel C. Janki Daniel C. Janki Executive Vice President & Chief Financial Officer

Date: October 9, 2025

DELTA AIR LINES, INC. 8-K

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): July 10, 2025

DELTA

AIR LINES, INC.

(Exact name of registrant as specified in its charter)

Delaware 001-05424 58-0218548

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

P.O. Box 20706, Atlanta, Georgia 30320-6001

(Address of principal executive offices)

Registrant’s telephone number, including area code: (404) 715-2600

Registrant’s Web site address: www.delta.com

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class Trading Symbol Name of each exchange on which registered

Common Stock, par value $0.0001 per share DAL New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR 240.12b-2).

Emerging growth company ☐

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. ☐

Item 2.02Results of Operations and Financial Condition.

Delta Air Lines, Inc. today issued a press release reporting financial results for the quarter ended June 30, 2025. The press release is furnished as Exhibit 99.1 to this Form 8-K.

The information furnished in this Form 8-K, including Exhibit 99.1 attached hereto, shall not be deemed incorporated by reference into any other filing with the Securities and Exchange Commission.

Item 9.01Financial Statements and Exhibits.

(d)  Exhibits.

Exhibit 99.1

Press Release dated July 10, 2025 titled “Delta Air Lines Announces June Quarter 2025 Financial Results”

Exhibit 104 The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

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SIGNATURES

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 hereunto duly authorized.

DELTA AIR LINES, INC.

By: /s/ Daniel C. Janki

Daniel C. Janki

Executive Vice President & Chief Financial Officer

Date: July 10, 2025

3