DELTA AIR LINES, INC.

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The accompanying unaudited Condensed Consolidated Financial Statements include the accounts of Delta Air Lines, Inc. and our consolidated subsidiaries, and have been prepared in accordance with accounting principles generally accepted in the United States ("GAAP") for interim financial information. Consistent with these requirements, this Form 10-Q does not include all the information required by GAAP for complete financial statements. As a result, this Form 10-Q should be read in conjunction with the Consolidated Financial Statements and accompanying Notes in our Form 10-K for the year ended December 31, 2024.

Management believes the accompanying unaudited Condensed Consolidated Financial Statements reflect all adjustments, including normal recurring items, considered necessary for a fair statement of results for the interim periods presented.

Due to seasonal variations in the demand for air travel, the volatility of aircraft fuel prices and other factors, operating results for the three and six months ended June 30, 2025 are not necessarily indicative of operating results for the entire year.

We reclassified certain prior period amounts to conform to the current period presentation. Unless otherwise noted, all amounts disclosed are stated before consideration of income taxes.

NOTE 2. REVENUE RECOGNITION

Passenger Revenue

Ticket

We recognized approximately $5.7 billion and $5.6 billion in passenger revenue during the six months ended June 30, 2025 and 2024, respectively, that had been recorded in our air traffic liability balance at the beginning of those periods.

Loyalty Travel Awards

Loyalty travel awards revenue is related to the redemption of mileage credits ("miles") for air travel. Our SkyMiles loyalty program allows customers to earn miles by flying on Delta, Delta Connection and other airlines that participate in the loyalty program. Customers can also earn miles through participating companies, such as credit card, retail, ridesharing, car rental and hotel companies, who purchase miles from us. Our most significant contract to sell miles relates to our co-brand credit card relationship with American Express. During the six months ended June 30, 2025 and 2024, total cash sales from marketing agreements related to our loyalty program were $4.0 billion and $3.6 billion, respectively, which are allocated to travel and other performance obligations.

Current Activity of the Loyalty Program. Miles are combined in one homogeneous pool and are not separately identifiable. Therefore, revenue is comprised of miles that were part of the loyalty program deferred revenue balance at the beginning of the period as well as miles that were issued during the period. The timing of mile redemptions can vary widely; however, the majority of miles have historically been redeemed withintwo years of being earned.

The table below presents the activity of the current and noncurrent loyalty program deferred revenue and includes miles earned through travel and miles sold to participating companies, which are primarily through marketing agreements.

Travel-Related Services

Travel-related services are primarily composed of services performed in conjunction with a passenger’s flight and include baggage fees, administrative fees and on-board sales. We recognize revenue for these services when the related transportation service is provided.

Revenue by Geographic Region

Operating revenue for the airline segment is recognized in a specific geographic region based on the origin, flight path and destination of each flight segment. A significant portion of the refinery segment's revenues typically consists of fuel sales to support the airline, which is eliminated in the Condensed Consolidated Financial Statements. The remaining operating revenue for the refinery segment is included in the domestic region. Our passenger and operating revenue by geographic region is summarized in the following tables:

NOTE 3. FAIR VALUE MEASUREMENTS

Assets/(Liabilities) Measured at Fair Value on a Recurring Basis

Cash Equivalents and Restricted Cash Equivalents. Cash equivalents generally consist of money market funds. Restricted cash equivalents generally consist of money market funds, time deposits, commercial paper and negotiable certificates of deposit. Restricted cash equivalents primarily relate to proceeds from debt issued to finance, among other things, a portion of the construction costs for our new terminal facilities at New York's LaGuardia Airport as well as certain self-insurance obligations and airport commitments. Restricted cash equivalents are recorded in other noncurrent assets and prepaid expenses and other on our Consolidated Balance Sheet ("balance sheet"). The fair value of these cash equivalents is based on a market approach using prices generated by market transactions involving identical or comparable assets.

Long-Term Investments and Related. Our long-term investments measured at fair value primarily consist of equity investments, which are valued based on market prices or other observable transactions and inputs, and are recorded in equity investments on our balance sheet. Our equity investments in private companies are classified as Level 3 in the fair value hierarchy as their equity is not traded on a public exchange and our valuations incorporate certain unobservable inputs, including non-public equity issuances. Fair value measurement using unobservable inputs is inherently uncertain, and a change in significant inputs could result in different fair values. See Note 4, "Investments," for further information on our equity investments.

Fuel Hedge Contracts. Our derivative contracts to hedge the financial risk from changing fuel prices are related to inventory at our wholly-owned subsidiary, Monroe Energy, LLC ("Monroe"). We recognized gains of $53 million and $33 million on our fuel hedge contracts in aircraft fuel and related taxes on our Condensed Consolidated Statements of Operations and Comprehensive Income ("income statement") for the three and six months ended June 30, 2025, respectively, compared to gains of $16 million and losses of $80 million for the three and six months ended June 30, 2024, respectively. The gains recognized during the first six months of 2025 were composed of $32 million of mark-to-market gains and $1 million of settlement gains on contracts. Gains and losses on settled contracts are reflected within Monroe's operating results. See Note 9, "Segments," for further information on our refinery segment.

NOTE 4. INVESTMENTS

(1)At June 30, 2025, we held 14.8% of the outstanding shares (including common and preferred), and 14.9% of the common shares, of Hanjin KAL.

(2)Our voting rights with respect to Wheels Up are capped at 29.9%.

NOTE 5. DEBT

(1)Interest rates on the Payroll Support Program ("PSP") Loans are 1.00% for the first five years and the applicable SOFR plus 2.00% in the final five years. The applicable interest rates will begin to adjust for the outstanding loans in January 2026 and April 2026.

(2)Due in installments during the years shown above.

(3)Certain financings are comprised of variable rate debt. All variable rates are equal to SOFR (generally subject to a floor) or another index rate, plus a specified margin.

2025 Unsecured Notes

In June 2025, we issued $2.0 billion in aggregate principal amounts of unsecured notes, consisting of $1.0 billion of 4.95% Notes due 2028 and $1.0 billion of 5.25% Notes due 2030 (collectively, the "Notes"). The Notes are included in Unsecured Notes in the table above. The net proceeds from the offering of the Notes were used to repay the PSP loan due 2030 included in Unsecured Payroll Support Program Loans in the table above and for general corporate purposes.

Availability Under Revolving Credit Facilities

As of June 30, 2025, we had approximately $3.1 billion undrawn and available under our revolving credit facilities.

Fair Value of Debt

Market risk associated with our fixed- and variable-rate debt relates to the potential reduction in fair value and negative impact to future earnings, respectively, from an increase in interest rates. The fair value of debt shown below is principally based on reported market values, recently completed market transactions and estimates based on interest rates, maturities, credit risk and underlying collateral. Debt is primarily classified as Level 1 or 2 within the fair value hierarchy.

Covenants

Our debt agreements contain various affirmative, negative and financial covenants. We were in compliance with the covenants in our debt agreements at June 30, 2025.

NOTE 6. EMPLOYEE BENEFIT PLANS

We sponsor defined benefit and defined contribution pension plans, healthcare plans and disability and survivorship plans for eligible employees and retirees and their eligible family members.

(1)Service cost relates to the market based cash balance plan. There is no service cost associated with traditional frozen defined benefit plans.

Service cost is recorded in salaries and related costs in our income statement, while all other components are recorded within miscellaneous, net under non-operating expense.

We also sponsor defined benefit pension plans for eligible employees in certain foreign countries which have immaterial obligations. These plans are not included in the net periodic cost table above.

NOTE 7. COMMITMENTS AND CONTINGENCIES

Aircraft Purchase Commitments

Our future aircraft purchase commitments totaled approximately $16.8 billion at June 30, 2025.

(1)The timing of these commitments is based on our contractual agreements with the aircraft manufacturers and remains uncertain due to supply chain, manufacturing and regulatory constraints. During the six months ended June 30, 2025, we were notified that certain aircraft deliveries would be delayed from 2026 into future years. These new delivery dates are reflected in the table above.

Our future aircraft purchase commitments included the following aircraft at June 30, 2025:

Legal Contingencies

We are involved in various legal proceedings related to employment practices, environmental issues, commercial disputes, antitrust and other regulatory matters concerning our business. We record liabilities for losses from legal proceedings when we determine that it is probable that the outcome in a legal proceeding will be unfavorable and the amount of loss can be reasonably estimated. Although the outcome of the legal proceedings in which we are involved cannot be predicted with certainty, we believe that the resolution of current matters will not have a material adverse effect on our Condensed Consolidated Financial Statements.

NOTE 8. ACCUMULATED OTHER COMPREHENSIVE LOSS

(1)Amounts reclassified from accumulated other comprehensive loss for pension and other benefit liabilities are recorded in miscellaneous, net in non-operating expense in our income statement.

NOTE 9. SEGMENTS

Refinery Operations

Our refinery segment operates for the benefit of the airline segment by providing jet fuel to the airline segment from its own production and from jet fuel obtained through agreements with third parties. The refinery's production consists of jet fuel, as well as non-jet fuel products. We use several counterparties to exchange non-jet fuel products produced by the refinery for jet fuel consumed in our airline operations.

Segment Reporting

Segment results are prepared based on our internal accounting methods described below, with reconciliations to consolidated amounts in accordance with GAAP. Our segments are not designed to measure operating income or loss directly related to the products and services included in each segment on a stand-alone basis.

(1)See table below for detail of the intersegment operating revenue amounts.

(2)Refinery cost of goods sold are included within aircraft fuel and related taxes and ancillary businesses and refinery in our income statement.

(3)The nature of other segment items for the airline segment are shown on our income statement and for the refinery segment include salaries and related costs, maintenance, utilities and other expenses.

(4)Refinery segment operating results are included within aircraft fuel and related taxes in our income statement.

(1)See table below for detail of the intersegment operating revenue amounts.

(2)Refinery cost of goods sold are included within aircraft fuel and related taxes and ancillary businesses and refinery in our income statement.

(3)The nature of other segment items for the airline segment are shown on our income statement and for the refinery segment include salaries and related costs, maintenance, utilities and other expenses.

(4)Refinery segment operating results are included within aircraft fuel and related taxes in our income statement.

(1)Represents transfers, valued on a market price basis, from the refinery to the airline segment for use in airline operations. We determine market price for jet fuel from the refinery by reference to the market index for the primary delivery location, which is New York Harbor.

(2)Represents value of products delivered under our exchange agreements, as discussed above, determined on a market price basis.

NOTE 10. EARNINGS PER SHARE

We calculate basic earnings per shareby dividing net income by the weighted average number of common shares outstanding, excluding restricted shares. We calculate diluted earnings per share by dividing net income by the weighted average number of common shares outstanding plus the dilutive effect of outstanding share-based instruments, including stock options, restricted stock awards and warrants. Antidilutive common stock equivalents excluded from the diluted earnings per share calculation are not material. The following table shows the computation of basic and diluted earnings per share: