The International Energy Agency warned this week that Europe has roughly six weeks of jet fuel left on hand, a warning confirmed by airline executives at an industry conference in Barcelona. The shortage stems from the Iran war disrupting tanker flows through the Strait of Hormuz, which has already driven jet fuel prices up sharply across Europe and the US. Without restored access to oil supplies or an alternative route around the blockade, major airlines would face forced cancellations within weeks and further airfare increases across transatlantic routes.