Delta Air Lines cut its 2026 profit forecast on October 9, lowering its adjusted earnings guidance to $5.10–$5.60 per share from the $6.50–$7.50 range it issued in July. The Atlanta-based carrier expects its annual fuel bill to rise by $6 billion compared with 2025.

The revision landed alongside record third-quarter results that illustrate the tension in Delta's economics: demand is strong, but fuel is outrunning it. Chief Financial Officer Erik Snell said Delta spent more than $500 million more on fuel in the third quarter than it had anticipated in its July forecast.

What did the third quarter deliver?

Adjusted revenue reached a record $17.6 billion, up 16% year over year, with little change in overall flight capacity. Adjusted net income rose 2% to $1.13 billion, or $1.72 per share. Reported net income fell 47% to $756 million, or $1.15 per share — the adjusted figures strip out certain investment gains and losses and fuel-hedging items.

Higher costs squeezed Delta's adjusted operating margin to 9.4%, down from 11.1% a year earlier. The adjusted fuel bill jumped 62% to $4.1 billion. Non-fuel unit costs climbed 7.3% per available seat mile, which Delta attributed primarily to higher crew and revenue-related expenses spread across less capacity growth than originally planned. Summer storms also played a part.

Despite the cost pressure, the airline still expects roughly $4.5 billion in adjusted pretax profit for the full year.

Where is the revenue strength coming from?

The answer is pricing and premium mix, not capacity. Revenue from premium cabins rose 18% in the third quarter, on a 6% increase in premium seats, higher fares and fuller cabins.

Economy told a similar story in reverse: Delta reduced economy seat count, yet revenue per available seat mile in that cabin rose 17%. Fewer seats, higher yields.

For the fourth quarter, Delta expects revenue to rise about 20% and plans to offer slightly more seats overall — but fewer in economy. That continues the mix shift toward premium cabins that has defined the carrier's revenue strategy.

What does Delta expect on fuel?

The fourth-quarter outlook assumes an adjusted fuel price of approximately $4.25 per gallon, up from $3.61 in the third quarter. The forecast includes savings of roughly 40 cents per gallon from Delta's refinery — a hedge of sorts that the carrier has leaned on before, and one that cushions but does not offset the market move.

What about the balance sheet and the fleet?

Payments from American Express increased 15% during the quarter, putting Delta on track to receive more than $9 billion from the partnership for the full year. That loyalty-and-co-brand stream remains a critical profit pillar as fuel volatility hits the operating line.

On the fleet side, Delta took delivery of 13 aircraft during the quarter, including Airbus A350-900s, A321neos and A220-300s. The deliveries point to continued widebody and narrowbody renewal even as the airline trims capacity growth plans.

Delta employees are on track to share nearly $900 million in profits earned during the first nine months of 2026, with payment scheduled for February 2027 — a signal the carrier still regards its profit-sharing commitment as affordable despite the guidance cut.

The test for the fourth quarter is whether a 20% revenue increase can absorb fuel at $4.25 per gallon; if it can, Delta's $4.5 billion adjusted pretax profit target holds, and if it cannot, further revisions are likely before year-end.