United Airlines to Cancel December Flights as Fuel Costs Bite

United Airlines is pulling some December flights off the schedule, with CFO Michael Leskinen citing surging jet fuel costs that have made certain routes uneconomic heading into the peak holiday travel window.

What United said

Speaking at the Morgan Stanley conference, Leskinen warned that some flights scheduled for December would not operate as planned, as increased fuel costs have made these routes less attractive for the airline.

“We are not flying to maximize market share. We’re flying to maximize profitability and free cash generation,” Leskinen said. The message to the market: capacity discipline over growth.

More cuts could extend into 2027

United said it would cancel some flights already scheduled for December, with further cuts possible into early 2027 if fuel prices stay high. Airlines are effectively signaling that the current fuel backdrop is not a one-quarter problem.

Demand is not the issue. Leskinen stressed at the Morgan Stanley conference that demand still remains “tremendously strong,” with corporate business travel seeing growth, while premium travel also remains resilient. The demand for economy seats was also holding up.

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Not just United

On September 16, at the Morgan Stanley conference, American Airlines informed its investors that it will be scaling back flight operations on thinner-margin routes, as fuel costs continue to surge due to the conflict in the Middle East.

Southwest said it has already cut its planned 2026 capacity growth roughly in half, from an original target of 2-3% growth. American Airlines said the latest fuel price increase alone would raise the company’s fourth-quarter expenses by approximately $1 billion.

Why it matters for the trade

Capacity cuts at the biggest US carriers during the highest-margin period of the year are a meaningful shift. It supports fares but pressures Q4 unit revenue growth, and it keeps the jet fuel input line squarely in focus for airline earnings.

For more airline and macro headlines, see the latest market news.

Options market and stocks to watch

Watch for volatility across the airline complex as investors digest the capacity guidance and monitor crude and jet fuel spreads:

UAL: watch for options flow and IV reaction into Q4 as United frames December cuts and possible extensions into Q1 2027.

AAL: watch for guidance risk after flagging a roughly $1B fuel cost hit to Q4 expenses.

LUV: watch for reaction to the halved 2026 capacity growth plan.

DAL: watch as the broader capacity discipline theme plays into legacy carrier pricing power.

USO: watch crude oil proxies as the fuel-cost narrative drives the airline trade.

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