McKinsey says disruptions to global jet fuel supply are tightening available volumes and raising costs for airlines, with potential airfare increases of roughly 20–25% heading into the summer travel season. Multiple reports attribute the pressure to geopolitical events and refinery constraints. They say jet fuel supply faces limits because major exporting regions—particularly the Gulf and parts of Asia, which together account for a large share of global output—restrict shipments, while inventories remain low. Demand is expected to rise ahead of the peak period, further worsening the balance.
The reports also cite crude oil-related movements as one driver of higher jet fuel prices, alongside changes in refining economics. They describe the jet fuel “crack spread” (the difference between crude oil and refined jet fuel) as historically averaging around USD 20 per barrel or less, but projecting it could average more than USD 50 per barrel in 2026, indicating higher refining margins and structural cost pressures.
While any increase in tanker traffic through the Strait of Hormuz could improve near-term supply flows, the reports warn that prices could remain volatile and elevated for months due to the time needed to rebuild inventories and normalize supply chains. Because fuel can account for about 30% of an airline ticket, a doubling of fuel costs passed through to consumers could translate into airfare hikes of about 20–25%.