Q2 2026 U.S. airlines’ earnings – New M.O. summary

Second-quarter earnings reinforced the growing divide between the four largest U.S. airlines. Delta Air Lines and United Airlines again produced outstanding financial results despite sharply higher fuel costs. Southwest Airlines emerged as the surprise story of the quarter, demonstrating that its commercial transformation is beginning to produce measurable financial results. American Airlines reported record revenue and strong growth in corporate travel but continued to struggle to convert that growth into meaningful profit.

Fuel dominated every earnings announcement. American and United each spent more than $2 billion more on fuel than a year earlier, while Delta’s adjusted fuel expense increased by $1.9 billion and Southwest absorbed an increase of almost $900 million. The same cost increase affected every airline, but the financial impact varied considerably. In terms of GAAP net income, Delta produced $1.6 billion, United delivered $805 million, Southwest reported $233 million and American generated $71 million.

The results also confirmed that corporate travel, premium cabins, loyalty programs and stronger pricing are driving airline economics. Main cabin revenue improved across the sector, but the airlines with the strongest premium products, customer loyalty and corporate relationships were better able to recover the higher cost of fuel.

One notable change from previous quarters is that corporate travel is no longer discussed as a recovery story. Every airline reported healthy managed business demand, with competition now focused on winning a larger share of profitable corporate travelers rather than waiting for demand to return.

Takeaways

Delta retained its lead. It again produced the highest revenue per available seat mile, the highest passenger load factor and the strongest operating margins while continuing to grow premium, corporate and loyalty revenue. Those results reflect years of investment in sales, marketing, agency relationships and premium products, with its refinery providing some additional protection against higher fuel costs.

United remained Delta’s closest competitor. Operating revenue increased 16 percent, contracted business revenue rose 27 percent and the airline maintained its full-year earnings ambitions despite expecting almost $6 billion of additional fuel expense.

Southwest delivered a meaningful improvement. Managed business revenue increased 30 percent, adjusted operating income more than doubled and the first full quarter of its new commercial model produced better revenue and margins.

American’s revenue is improving, but its profit recovery remains slow. Managed corporate revenue increased 26 percent, TMC revenue rose 19 percent and premium revenue continued to grow. Those gains produced only $99 million of adjusted net income on revenue of $16.7 billion.

Fuel exposed the underlying strength of each airline. Delta and United had enough revenue quality and margin to remain highly profitable. Southwest improved its earnings despite the cost increase. American’s limited margin left it with very little protection.

Corporate travel has become an important source of growth across all four airlines. The competition for managed business, premium travelers and loyalty members will become more intense as airlines try to recover higher operating costs through stronger yields.

In short

Delta produced the strongest result and remains the benchmark for revenue quality, load factor, premium travel, loyalty and consistent delivery.

United stayed in a strong second position, with corporate demand, pricing and its global network supporting another profitable quarter.

Southwest demonstrated that its commercial overhaul is delivering tangible financial benefits and has become a much stronger competitor in the domestic corporate market.

American reported encouraging commercial data and has regained some of the corporate and agency business lost during its failed distribution strategy. Its financial result remains far behind Delta and United, and it now faces growing competition from a stronger Southwest.

Fuel explains much of the year-over-year decline in earnings, but it does not explain the size of the performance gap. The airlines that invested consistently in premium products, loyalty and corporate relationships over the last five years are now demonstrating a much greater ability to absorb economic shocks.

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Airline comparison (Q2 2026)

Revenue per available seat mile (RASM) figures are based on the metrics reported by each airline. Delta’s reported figure excludes third-party refinery sales and certain other adjustments. Other figures are reported on a GAAP basis unless identified as adjusted.

Revenue quality and cost 

Comparing reported revenue per available seat mile (RASM) with cost per available seat mile (CASM) provides a simple comparison of how efficiently each airline converted capacity into revenue relative to its operating costs. It is not a measure of profitability, but it is a useful indicator of commercial performance.

Delta again produced the strongest revenue-cost spread, reflecting its continued ability to generate higher revenue while maintaining cost discipline. United ranked second and continued to benefit from strong corporate demand and pricing. Southwest’s spread remained positive despite significant changes to its commercial model, while American’s spread left much less room to absorb interest expense and other costs below the operating line.

American’s operating margin fell from 7.9 percent a year earlier to 2.7 percent despite revenue increasing by more than 16 percent. The airline’s challenge remains converting strong commercial performance into sustainable profitability. 

What buyers should watch during the second half of 2026

• Can American continue rebuilding corporate and agency share while improving profitability

• Will American offer agencies and corporate customers enough commercial support to win profitable business back from Delta and United?

• Can Southwest sustain its managed business growth after the initial introduction of bag fees, assigned seating and new fare products?

• How much of the fuel increase will airlines recover through fares, and how much will be managed through capacity reductions and better operations?

• Will Delta’s refinery continue to provide a meaningful cost advantage if fuel prices remain elevated?

• Will the airlines’ investment in apps, automation and onboard technology produce better service when travelers need human help during disruption?

• Can United and Delta maintain their investment programs while controlling the growth in non-fuel costs

Primary sources

• Delta Air Lines — Q2 2026 financial results
• United Airlines — Q2 2026 earnings release and investor update
• American Airlines — Q2 2026 financial results and earnings call
• Southwest Airlines — Q2 2026 financial results