Not prohibitively expensive when shared among passengers

The price for SAFs is generally between three and five times higher than that of conventional jet fuel. For passengers, the cost per ticket would not vary all that greatly when shared.

On an intra-European flight, the cost for 10% SAFs in the tanks is about $5 to $10 per ticket. For a long-haul service, it adds about $40. But they still have to be willing to pay for it and make airlines aware that they are.

Otherwise, without regulatory mandates, demand will remain low. The investment needed to sufficiently scale the production of SAFs will not materialize, and the supply will not be enough to make a dent in aviation’s greenhouse gas emissions