Disruption to global oil supplies from the Iran war has added more than $100 to the price of long-haul flights from Europe, a cost ​likely to trigger higher ticket prices, campaign group Transport & Environment (T&E) said.

The rise in ‌jet fuel prices has increased the average fuel cost by 88 euros ($104) for each passenger on long-haul flights leaving Europe and 29 euros on flights within Europe, T&E said.

Its analysis compared prices as of April ​16, with those just before the U.S. and Israeli war with Iran began on ​February 28.

Jet fuel for a flight from Barcelona to Berlin would be ⁠26 euros more expensive per passenger, while a long-haul trip from Paris to New York ​would cost 129 euros more in fuel, T&E estimated in its analysis published on Tuesday.

European airlines ​are preparing for a challenging spring and summer, with jet fuel prices having risen to well over $100 a barrel since the Iran war began and concern growing that shortages could lead to flight cancellations.

The European Union ​is set to respond with guidelines on managing limited jet fuel supply on Wednesday.

T&E calculated the ​average fuel burn on all flight routes departing from Europe, and divided this by the number of departing ‌passengers, ⁠to calculate how much the fuel price spike would add to the cost per person.

Airline executives from carriers including Lufthansa, Ryanair and Air France-KLM said in March that they were likely to pass on higher fuel costs to consumers if the Strait of Hormuz remained closed longer-term.

T&E ​said its calculations showed ​the extra costs ⁠from the fuel price spike were far bigger than the costs airlines face from complying with EU climate change policies.

“The Middle East crisis proves ​that our real vulnerability is a tank filled with foreign oil, ​not the ⁠laws designed to fix it,” said Diane Vitry, director of aviation at T&E.

Airlines have called for a rollback of some EU climate policies, including a 2030 mandate to use synthetic green jet fuel ⁠as ​well as a review of upcoming carbon pricing rules.

As ​part of its package, the EU is set to push for energy independence through greater investments in green jet fuel.

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