Aviation United launches scheduled SFO-LAX biofuel flights By Robert Silk / March 11, 2016 Share 1 -- United has become the first U.S. airline to make use of biofuel for regularly scheduled flights, the carrier said Friday.Until March 25, United will use Honeywell Green Jet Fuel on all flights between San Francisco and Los Angeles. The product is made from non-edible animal fats and oils, Honeywell said in a press release. Depending on the precise make-up of the product, Honeywell Green Jet Fuel can offer a 65% to 85% reduction in greenhouse gas emissions compared with conventional jet fuel. The Los Angeles-San Francisco flights will use a blend of 30% renewable jet fuel and 70% traditional jet fuel.After March 25, the airline will combine the biofuel with the conventional fuel it uses for its Los Angeles operations. "Today's historic launch of regularly scheduled service utilizing advanced biofuels represents a major next step in our ongoing commitment to operate sustainably and responsibly," said Angela Foster-Rice, United's managing director of environmental affairs and sustainability.United previously agreed to purchase up to 15 million gallons of biofuel over the next three years.