December 18, 2025 [SAF Investor]- Swiss International Air Lines (SWISS) and Swiss cleantech company Synhelion have signed a long-term offtake agreement for sustainable aviation fuel (SAF) with deliveries beginning from 2027.
Under the agreement, SWISS will purchase 200 tons of SAF from Synhelion annually. SWISS is the first airline to sign a binding five-year SAF offtake agreement with Synhelion.
“The partnership with Synhelion is a significant step for SWISS on the path to decarbonizing our flight operations,” says Jens Fehlinger, CEO of SWISS. “Sustainable aviation fuels (SAF) are a core element of our sustainability strategy. The offtake agreement with Synhelion sends a strong signal for innovation and responsibility in aviation.”
From 2027, Synhelion will produce renewable synthetic crude oil, known as “syncrude”, at its first commercial plant. The syncrude will be processed in an existing refinery together with fossil crude oil and refined into certified Jet-A-1 fuel.
The fuel will be delivered to the airport via the regular logistics chain and fed into the fuel supply system. Synhelion’s synthetic jet fuel is based on renewable energy and sustainable feedstocks.
“The fact that SWISS, a leading airline, has committed early on to adopt our fuels demonstrates confidence in the market readiness of our technology,” says Philipp Furler, Co-CEO and Co-founder of Synhelion. “This partnership is a milestone for the commercial market launch of our fuels – and sets a powerful example to other airlines worldwide.”
In July 2025, SWISS became the first airline to use solar fuel from Synhelion in regular flight operations.
Synhelion delivered its first barrel of syncrude from its DAWN plant to a refinery in northern Germany, where the syncrude was processed into certified jet fuel (Jet-A-1) and subsequently fed into the fuel supply system via Hamburg Airport.
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