The Strait of Hormuz closure has cut off 20% of the world's exported jet fuel from airlines and halted one fifth of global crude oil from reaching refineries. That disruption is rippling through the aviation network as carriers brace for higher fuel costs and potential shortages this summer, with uneven impacts hitting the U.S., Europe, and Asia differently.

Even if the strait reopened today, analysts warn it could take many months before refineries resume normal operations and jet fuel shipments flow freely again. The chokepoint disruption has created supply chain bottlenecks that won't clear overnight, complicating how airlines and travelers plan around the uncertainty.

Airlines facing pricier fuel and tighter supplies this summer underscore how dependent the global aviation network remains on Middle Eastern shipping routes. The uneven regional fallout means some markets still haven't felt the pinch, but the economic drag is already reshaping summer travel economics.