Pricier Tickets, Fewer Flights: How the US-Iran War Is Reshaping Summer Travel

The Middle East war has detonated inside the aviation industry. Nearly eight weeks after US and Israeli strikes on Iran triggered the effective closure of the Strait of Hormuz, jet fuel prices have more than doubled.

With peak summer travel season barely a month away, the cracks are already showing.

Inside the Jet Fuel Shock Upending Summer 2026

Carriers around the globe are paring back their schedules in a coordinated push to contain soaring fuel costs, with route reductions hitting hardest in Europe and Asia. 

On Thursday, Lufthansa Group became the latest to join the retreat, announcing plans to scrap 20,000 short-haul departures through October.  The pullback stretches across major aviation markets:

• Dutch airline KLM is cutting 80 flights from its schedule, blaming rising jet fuel prices.
• Scandinavian carrier SAS noted that it will cancel roughly 1,000 flights this month.
• Cathay Pacific will trim roughly 2% of scheduled passenger flights between May 16 and June 30.
• HK Express, Cathay’s budget arm, is slashing roughly 6% of flights starting May 11.
• WestJet is rolling out a graduated retreat, trimming capacity by 1% in April, 3% in May, and 6% by June.
• Vietnam Airlines has issued one of the starker warnings, signaling it may cut up to 18% of its international network and as much as 26% of its domestic service.

The financial strain is clearly showing up in airline books. A Forbes report highlighted that the “big four” airlines,  American, Delta, United, and Southwest, each posted record first-quarter revenue. Yet, ballooning fuel expenses wiped out much of the upside, pushing American and Delta into the red for the period.

The pressure prompted United and American to trim their 2026 outlooks this week, citing the run-up in jet fuel prices. Furthermore, Southwest chose not to update its full-year guidance. American warned investors its fuel tab will swell by $4 billion over 2026, and Delta flagged an additional $2 billion hit in the second quarter alone.

Summer Travel Boom at Risk as Fuel Shortage Rattles Aviation Economy

The pain isn’t confined to the carriers, with fewer seats on sale and fuel bills climbing, passengers are absorbing the hit through sharply rising ticket prices.

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IEA Director Fatih Birol warned last week that Europe has about six weeks of jet fuel stocks left. He called the situation the largest energy crisis the global economy has faced. Moreover, Kpler analyst Matt Smith said airlines and passengers should not expect quick relief.

“It’s going to take until at least July. And even that may be optimistic at this point,” Smith said.

For many European nations, the summer travel boom is an economic lifeline. ACI Europe data shows aviation generates 851 billion euros, nearly $1 trillion, in GDP and supports 14 million jobs across the region.

If the cuts deepen into peak season, the ripple effects could extend well beyond airline balance sheets, threatening the tourism-driven economies that count on a busy summer sky.

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