How the company works
What it sells, how it makes money, and the anatomy of the extremes: what has to break for the result to land far from the forecast, either way. In Delta Air Lines's own words, from its annual report for 2025.
Delta flies over 200 million customers a year through hubs in Atlanta, Detroit, Minneapolis-St. Paul and Salt Lake City and on the coasts, and sells SkyMiles to American Express.
How it makes money
Tickets, with premium seats now level with main cabin: premium products brought $22.1B in 2025, up 7%, and main cabin $23.4B, down 5%. Loyalty travel awards added $4.2B and travel-related services $2.0B; passenger revenue was $51.8B. Other revenue, $10.7B, holds the refinery's third-party sales ($5.1B), loyalty program revenue from miles sold to partners ($3.4B), and ancillary businesses such as maintenance for other airlines and Delta Vacations. Remuneration from American Express totaled $8.2B, and the company expects it to grow to $10B over the next few years. Operating revenue was $63.4B, up 3%; net income $5.0B.
What it sells
| 2025 | Revenue | Change |
|---|---|---|
| Ticket, premium productsDelta One, First Class, Delta Premium Select, Delta Comfort+ | $22.1B | +7% |
| Ticket, main cabin | $23.4B | −5% |
| Loyalty travel awardsflights redeemed with SkyMiles | $4.2B | +10% |
| Travel-related servicesbags, seat selection, upgrades | $2.0B | +4% |
| Cargo | $900M | +9% |
| Otherrefinery sales, loyalty program (miles sold to American Express and partners), maintenance for other airlines, Delta Vacations | $10.7B | +8% |
Operating revenue by line as Delta reports it; total $63.4B.
Unit economics
A network with high fixed costs sold seat by seat: revenue per available seat mile was 21.26 cents. The largest costs are people, $17.5B, up 8%, with $1.3B of profit sharing on top, and jet fuel, $9.8B, down 7% on price, which the Monroe refinery is there to hedge. A fleet of 1,314 aircraft is being refreshed with more premium seats; 12% of revenue miles flown were award travel, around 35 million award tickets. The company is rated investment grade by all three agencies and names debt reduction a priority.
Competitive position
Delta names its advantages as "our people and culture, operational reliability, global network, customer loyalty and financial foundation": North America's most on-time airline for the fifth year running, first with corporate travelers for the 15th year, and "the airline of choice for premium customers". Domestic rivals are American and United, the point-to-point carriers Alaska, JetBlue and Southwest, and the ultra-low-cost Allegiant, Frontier and Spirit. Abroad it flies joint ventures with Air France-KLM and Virgin Atlantic (49% owned), Aeroméxico, LATAM and Korean Air.
Biggest cost inputs
Salaries and profit sharing; jet fuel, the price set by the market and the refinery; landing fees and rents at airports, $3.6B and up 13%; contracted services; payments to regional carriers, $2.6B; aircraft, engines and parts, exposed to tariffs; and maintenance.
Anatomy of a large upside
- Premium and loyalty keep outgrowing the seat. Premium ticket revenue grew 7% while main cabin fell 5%; American Express pays $8.2B a year on its way to $10B, and loyalty awards grew 10%, so more of the revenue comes from products that do not depend on fares.
- Fuel stays cheap and the hubs stay full. Fuel fell 7% to $9.8B in 2025; a cheap barrel and core hubs with "strong local passenger share" and "strong margins" turn into record earnings and a faster path on debt.
- The industry stays disciplined. Capacity grows no faster than demand, the low-cost carriers do not chase share, and Delta's premium mix holds the revenue lead over American and United.
Anatomy of a large downside
- A downturn in travel. Airlines are "subject to significant competition" and a recession, a pandemic or a shock cuts premium and corporate travel first, with $17.5B of salaries and the fleet still to pay for.
- Fuel and labor run away. Jet fuel is the second cost and set by the market; pay rose 8% in 2025, and tariffs on aircraft and parts "could substantially increase our costs".
- The low-cost carriers and the hubs. Carriers "focused on maintaining low costs" add capacity in Delta's markets, or a hub partner or joint venture changes, and the fare premium narrows.
Written from Delta's annual report for 2025, in its words and numbers. The extremes are the long view, what has to break for the result to land far from the forecast; the quarter's own cases, each model's, are on the quarter forecast.