"In 2022, U.S. airlines used 18 million gallons of SAF. And while that is just 0.1 percent of the 18 billion gallons of fuel used each year by U.S. airlines, energy-industry analysts predict that renewable fuels will be significantly more economical to produce by 2030 and comprise 20 to 30 percent of all aviation fuel by 2050.
At the moment, United Airlines is the domestic carrier using the most SAF; it will purchase about 3.4 million gallons in 2023 and has advance orders for 3 billion more gallons over the next several years. Also, Delta plans to purchase at least 75 million gallons of corn-based SAF each year so that it comprises 10 percent of the fuel Delta uses by 2030.
Dropping a bit more. And I agree with @belikewater -I'm not seeing anything from Cemvita that they are close to being ready.
And this, makes me think United is going in big... but for the long run.
Bolding my own emphasis:
https://www.meetingsnet.com/sustainability/sustainable-jet-fuel-where-s-it
"In 2022, U.S. airlines used 18 million gallons of SAF. And while that is just 0.1 percent of the 18 billion gallons of fuel used each year by U.S. airlines, energy-industry analysts predict that renewable fuels will be significantly more economical to produce by 2030 and comprise 20 to 30 percent of all aviation fuel by 2050.
At the moment, United Airlines is the domestic carrier using the most SAF; it will purchase about 3.4 million gallons in 2023 and has advance orders for 3 billion more gallons over the next several years. Also, Delta plans to purchase at least 75 million gallons of corn-based SAF each year so that it comprises 10 percent of the fuel Delta uses by 2030.