US airlines spend $6.66 billion on jet fuel in May, an 84% year‑over‑year rise

U.S. airlines paid $6.66 billion for jet fuel in May, the second consecutive month the monthly bill topped $6 billion. The cost was 84 % higher than in May 2025, driven mainly by a jump in fuel prices rather than higher consumption. Carriers used 1.627 billion gallons in May, 0.6 % less than a year earlier, while the average price per gallon was $4.09, up from $2.21 a year earlier. In April the fuel bill was $6.47 billion.

The surge reflects the impact of the Middle‑East conflict that has disrupted shipping through the Strait of Hormuz, a key route for global crude and jet fuel supplies. An interim U.S.–Iran cease‑fire has eased prices somewhat, but the truce remains fragile; three tankers were struck by projectiles in the strait and the U.S. revoked a license allowing Iranian oil sales.

Airlines have responded by raising fares, adding fuel surcharges and trimming schedules. Delta Air Lines is slated to report its second‑quarter earnings, and executives are expected to discuss how the recent price dip—average $2.90 per gallon at major hubs—might affect finances.