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United States · Business news · Corporate · 17 Sept 2026

American and United trim flying plans as jet fuel adds about $1 billion to American's fourth-quarter costs

US Industrials Energy

What happened

Finance chiefs of large US airlines told an investor conference that higher fuel prices are changing their schedules. American Airlines said fourth-quarter jet fuel is running about $1 a gallon above its July assumption, adding roughly $1 billion of cost, and that it is adjusting capacity. United said some December flights it had planned will not operate, with more changes into early 2027 if prices stay high. Southwest's finance chief spoke of paring back about half of its planned 2026 capacity growth; a spokesperson later said that was an illustration and that schedule changes so far were minimal. The global average jet fuel price rose 6.1% in a week to $181.46 a barrel, according to IATA.

Why it matters for listed companies

Fuel is the airlines' largest variable cost and most US carriers do not hedge it, so a move of this size goes straight to operating margins. Cutting flights protects fares on the remaining seats and reduces demand for airport services; if cuts last, they can also slow aircraft deliveries and maintenance work, which bears on plane and engine makers and lessors. The carriers also reported strong bookings, and American guided to third-quarter revenue growth of 16% to 19%, so demand was not the problem, cost was.

Reported by Fox Business — “Major airlines cut flights as higher jet fuel prices hit carriers” ↗ on 17 Sept 2026.

Rates and currencies since this was reported

Official series on 17 Sept 2026 or the last day before it, and the latest observation.

US Treasury 2-year yield
4.67% → 4.77% +10 bp
17 Sept 2026 → 15 Oct 2026 · US Treasury
US Treasury 10-year yield
4.94% → 5.10% +16 bp
17 Sept 2026 → 15 Oct 2026 · US Treasury
Effective fed funds rate
3.88% → 3.88% unchanged
17 Sept 2026 → 14 Oct 2026 · Federal Reserve Bank of New York
Euro in US dollars
1.1481 → 1.1208 -0.0273
17 Sept 2026 → 15 Oct 2026 · ECB reference rate
These figures are measured, not attributed. Prices and rates move for many reasons at once; they show what happened after this story, not that the story caused it. Nothing here is a recommendation to buy, sell or hold.

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