21 September 202116 September 2021 United, Honeywell Invest in New Clean Tech Venture from Alder Fuels, Powering Biggest Sustainable Fuel Agreement in Aviation History United agrees to purchase 1.5 billion gallons of sustainable aviation fuel (SAF) over 20 years - which is one and a half times the size of the rest of the world's airlines' publicly announced SAF commitments combined
