European airlines are preparing to challenge European Union (EU) rules requiring the use of synthetic sustainable aviation fuel from 2030, two sources told Reuters, and plan to urge a delay or repeal of the mandate due to concerns over high costs and scarce supply.
The move would target EU rules requiring airlines to use a certain amount of synthetic green jet fuel, or eSaf, from that year, with an industry announcement set for Thursday.
The planned challenge, previously unreported, remains under discussion and could still change, the sources said, as regulators have privately pushed back against the idea.
The European Commission did not immediately respond to a request for comment.
The airline sector, already impacted by flight disruptions and higher fuel costs linked to the Iran war, says Europe’s green jet fuel mandates are too strict, with insufficient supply on the market and prices that are too high to absorb.
Aviation is among the hardest sectors to decarbonise, with zero-emission aircraft not expected this decade, leaving green fuels, with lower emissions than conventional jet fuel, as one of the few immediate options to cut emissions from air travel.
‘Over a billion eyeballs will be on the parade’: St Patrick’s festival CEO Richard Tierney
Europe’s airline executives are following in the footsteps of the car industry, which last year managed to water down a rule banning the sale of carbon dioxide-emitting cars after 2035.
The announcement is expected at an industry conference organised by trade group Airlines for Europe (A4E), with details still being finalised, the sources said.
A4E’s members include Air France-KLM, Lufthansa, Ryanair, EasyJet and British Airways and Aer Lingus owner IAG.
“They want to postpone the eSaf requirements until there is enough production online,” said Camille Mutrelle, a policy officer at advocacy group Transport and Environment (T&E) who has knowledge of the plans. T&E supports keeping the rules in place.
“If we postpone, eSaf start-ups will die and Europe will lose the early-mover advantage.”
One of the two sources who was familiar with the discussions said airlines were also considering urging that the eSaf mandate be scrapped altogether.
An A4E spokesperson said in a statement to Reuters its members were set to meet on Thursday, but did not comment on the group’s position, saying airline chief executives would make the decision.
In a later statement, A4E said eSaf was a “nascent technology” and that projects with firm investment were expected to only produce 0.7 per cent of volumes needed to meet EU targets in 2030.
“Under the current eSaf trajectory, passengers would be forced to pay €7 billion to €9 billion of penalties, pushed on to airlines by fuel suppliers,” it added.
The EU requires 2 per cent of fuel made available at regional airports to be sustainable aviation fuel (Saf) in 2025, rising to 6 per cent in 2030, with synthetic Saf (eSaf) accounting for 1.2 per cent from 2030, rising to 5 per cent in 2035, under current plans.
Airlines say there’s little available supply of synthetic jet fuel and that planned production facilities are unlikely to come online in time to meet the mandate.
Most Saf on the market is made from used cooking oil or animal waste, costs three to five times more than traditional jet fuel and makes up just 0.3 per cent of global jet fuel supply.
Synthetic sustainable jet fuel is made from renewable energy such as captured carbon dioxide or green hydrogen. It emits less carbon than bio-based Saf, but is much more expensive to make. – Reuters
(c) Copyright Thomson Reuters 2026
