
Europe may only have "perhaps six weeks of jet fuel" if supplies from the Middle East are not restored, the head of the International Energy Agency (IEA), Fatih Birol, has warned.
He said the fuel shortage could cause flight cancellations if the situation does not improve.
The Strait of Hormuz, a key route for jet fuel from the Gulf, has been closed by Iran for more than six weeks, driving up prices and sparking fears of shortages.
Europe depends on the Middle East for about 75% of its jet fuel imports.
The IEA said European countries are trying to replace lost supplies with shipments from the US and Nigeria, but these shipments can only cover a little more than half of the shortfall.
If Europe fails to compensate for more than 50% of lost imports, physical shortages could appear at certain airports.
Experts warn that even the resumption of supplies from the Gulf may not be enough to avoid shortages during the peak summer travel season, especially for smaller airports, while major airports such as Heathrow may have priority.
The price of fuel for European jets reached a record of $1,838 per ton in early April, up from $831 before the conflict began.
Airlines have reported significant additional costs due to supply uncertainty, while the European Commission is monitoring the situation and will announce emergency measures in the coming weeks.
The industry warns that if the Strait of Hormuz remains closed, the continent could face fuel shortages for jets, affecting airline operations and customer demand.