Aer Lingus, the Irish airline, has announced that it is canceling 500 flights, or roughly 2% of its summer schedule, due to high jet fuel prices. The cancellation affects both short routes to nearby European cities and longer transatlantic flights. The airline's cancellation follows Delta Air Lines and Air Canada each cutting six routes to different U.S. cities from its summer flying schedule. Dutch flag carrier KLM also cancelled 160 flights initially scheduled between May and September 2026 due to rising kerosene costs. The International Energy Agency has warned that multiple European countries could face shortages of jet fuel within the next six weeks. The latest round of route cuts has raised concerns among travelers about a potential domino effect of more cancellations.