United and other airlines are cutting flights over high jet fuel costs and shortages.Justin Sullivan/Getty ImagesJet fuel costs and supplies across the globe are under pressure from the US and Israeli war on Iran.19 of the world's 20 largest airlines have cut flights in May, according to Cirium data.Airlines have largely cut routes with multiple daily flights or those with lower demand.First, the Iran war made flights more expensive. Now, it's making them disappear.All but one of the world's 20 largest airlines are reducing capacity in the coming months, according to aviation analytics firm Cirium.Its analysis found the planned global capacity for May has dropped three percentage points since early March.
Cirium revised its initial prediction of 4%-6% growth this year, saying it could decline by up to 3% under some potential scenarios.The war has disrupted supply chains, trapping oil in storage facilities across the Middle East.That saw the price of Brent crude oil rocket past $100 a barrel in early March, before dipping back below that benchmark once ceasefire talks began this month.Jet fuel prices have risen even faster, doubling in price to almost $200 a barrel. And as the war drags on, jet fuel is getting harder to come by for countries that don't produce it or have limited supplies."In Europe, we have maybe six weeks or so (of) jet fuel left," the International Energy Agency's executive director, Fatih Birol, told the Associated Press on April 16.Willie Walsh, the director general of the International Air Transport Association, an airline trade group, said the next day that "by the end of May we could start to see some cancellations in Europe for lack of jet fuel.""This is already happening in parts of Asia," he added in the statement.⛽️✈️ There have been some reports suggesting Europe could be close to running out of jet fuel.
That is not an accurate reflection of the situation. The EU has sufficient fuel supplies for airports and aircrafts for the coming period. There are currently no flight cancellations… pic.twitter.com/jFpplywa5C— Apostolos Tzitzikostas (@tzitzikostas) April 18, 2026 However, the European Union's transport commissioner, Apostolos Tzitzikostas, denied that the continent was close to running out of jet fuel."Any cancellations announced so far by European airlines are linked to the high cost of jet fuel, not to supply shortages," he added.Several airlines have already canceled flights or grounded airplanes due to rising costs.Here's a look at some of the airlines that have already started canceling flights due to rising prices and falling supplies.European airlinesRyanair, Europe's largest airline, said it is considering reducing routes.CEO Michael O'Leary said its jet fuel supply could be at risk if the war continues during an interview with Sky News."We don't expect any disruption until early May, but if the war continues, we do run the risk of supply disruptions in Europe in May and June," he said.KLM said on April 17 that it was canceling 80 return flights from Amsterdam's Schiphol Airport, its main base.It added that these routes were "no longer financially viable to operate" due to rising kerosene costs.
The airline also clarified that there was no kerosene shortage.Lufthansa Group said in a press release on April 21 that the airline is cutting around 20,000 short-haul flights through October as it trims "unprofitable routes" and in response to surging fuel costs. The move is expected to save more than 40,000 metric tons of jet fuel, said Lufthansa."The planned consolidation of the European network is being carried out across Lufthansa Group's six hubs in Frankfurt, Munich, Zurich, Vienna, Brussels, and Rome," said Lufthansa"Passengers will therefore continue to have access to the global route network, particularly long-haul connections," Lufthansa added.
According to the press release, initial adjustments will be in place by May, and the airline expects to have a sufficient fuel supply for the coming weeks.KLM airplanes at Amsterdam Schiphol Airport.Patrick van Katwijk/Getty ImagesSwitzerland's Edelweiss Air also said it was canceling flights to the US, due to declining demand and rising fuel prices. It will no longer fly to Denver or Seattle, and will reduce the frequency of flights to Las Vegas.A spokesperson for Scandinavian Airlines said that it would cut about 1,000 flights in April due to the surge in jet fuel costs.They added that most of the canceled flights were on short-haul routes in the Nordic region, at airports with multiple daily flights.And Aer Lingus said on April 20 that it had made adjustments to 2% of its schedule. In a statement, it said there were cancellations due to "mandatory maintenance on aircraft, along with a limited number of schedule adjustments."The Irish Independent had previously reported that over 500 flights were being cut.Asian airlinesSeveral airlines in Asia said they would cut flights to mitigate fuel shortages and mounting costs.Vietna