Leading US airline American Airlines (American) has announced it has finalised an agreement with renewable chemicals and advanced biofuels company Gevo for the supply of sustainable aviation fuel (SAF).

The five-year agreement – the biggest SAF commitment by American to date – would involve the purchase of 500M gallons (1.9M litres) of SAF, the company said, with the first deliveries expected in 2026.

“The use of SAF is a cornerstone of our strategy to decarbonise air travel. While this landmark investment represents meaningful action by American Airlines, driving progress at the scale and pace we need requires critical policy action in Washington and at the State level,” American’s vice president of sustainability Jill Blickstein said in the 22 July statement.

Following the agreement with Gevo, American’s low carbon fuel commitments total 620M gallons (2.3M litres) to date – fulfilling approximately 20% of the airline’s goal to replace 10% of jet fuel usage with SAF by 2030.

American’s climate goals include achieving net-zero greenhouse gas (GHG) emissions by 2050.