Jet-fuel prices spiked after fighting between the U.S. and Iran, forcing carriers such as KLM and Lufthansa to cut flights and add surcharges. Airlines say the cost shock is squeezing margins, widening gaps between big and small carriers and putting pressure on aviation credit markets.

Fuel shock and route cuts Jet fuel markets tightened quickly after fighting between the U.S. and Iran disrupted supply routes, and carriers moved to protect cash. KLM said it will cancel some flights in the coming month because of rising fuel costs. Lufthansa went further — grounding planes after saying the surge in fuel prices made some operations uneconomic. Air France-KLM added a fuel surcharge to tickets, and several carriers warned of further capacity reductions if the price environment holds. Fuel price pressure works through several channels. The Strait of Hormuz, a chokepoint for oil shipments, has been intermittently affected during the conflict, shrinking available jet fuel supplies and raising refinery and transport premiums. The European Union has signaled plans to maximize refinery output to ease shortages, but refining capacity cannot be turned on overnight. Where the pain is landing The financial hit is uneven. Wizz Air said the conflict will negatively affect its annual profit, and easyJet warned bookings were below last year’s levels and that forward visibility had worsened; its stock fell after the warning. Ryanair and other carriers also saw share declines. In the U.S., industry structure amplifies the squeeze. Bill McGee, senior fellow for aviation and travel at the American Economic Liberties Project, said U.S. carriers show a sharp split: the largest airlines are earning record profits while many smaller carriers are losing money or barely treading water. He pointed to deeper, systemic problems dating to the Airline Deregulation Act of 1978 and noted the sector has a long history of failures since then. Revenue levers and cost passes Airlines are reacting on both revenue and cost fronts. Many carriers have imposed fuel surcharges and raised baggage and ancillary fees. Delta executives have signaled they want to retain pricing gains that came with higher energy costs rather than pass them straight back to customers should fuel ease. Smaller carriers have sought direct relief: Spirit, Frontier and other low-cost operators met with the U.S. transportation secretary to press for temporary tax relief to offset jet-fuel bills. The pricing gap matters. McGee said the presence of low-cost carriers keeps fares lower across routes where they compete, benefiting even passengers on the big legacy carriers. If smaller airlines fail, that competitive pressure could ease — and fares could remain higher for longer. Investor reaction and credit implications Markets reacted to the changing risk picture: shares fell for several carriers after warnings and groundings. Lenders and investors are watching earnings closely for signs the fallout will hit fragile profit margins and cash-flow forecasts across the sector. Analysts warn more groundings, capacity cuts and surcharges are likely if fuel prices remain elevated. That feeds into financing stress: when airlines cut capacity and bookings shorten, cash flows become harder to forecast and revenue drops can compound already-thin margins. For carriers that rely on debt markets to fund operations or aircraft purchases, reduced visibility and a weaker profit outlook raise borrowing costs and strain access to credit for weaker carriers.

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Lufthansa grounded planes after saying the surge made some operations uneconomic.

This article was created with AI assistance.