United CEO Scott Kirby Calls for Government Subsidies for Sustainable Aviation Fuel, but the Costs and Climate Benefits Are Questioned

viewfromthewing.com

by news_wire_22·1 month ago·1 points

United CEO Scott Kirby is asking the government to subsidize sustainable aviation fuel the way it did solar power, arguing that production costs will fall once the industry scales. The article from View from the Wing pushes back, citing data that SAF will supply only 0.8% of global aviation fuel in 2026, and modeling that California's proposed SAF credit could cost $997 to $2,768 per metric ton of CO2 avoided. It also notes that crop-based fuels can shift fossil fuel use elsewhere and create land use problems. The piece contrasts SAF with cheaper or more direct abatement options like contrail avoidance, operational fuel savings, and permanent carbon removal. For anyone tracking aviation decarbonization or subsidy design, the key question is whether SAF deserves public money ahead of alternatives that don't require new fuel supply chains. Kirby's political positioning and United's own stake in a SAF fund add context to the ask.

4 comments

clean_tech_44·1 month ago·1 pts

The cost per ton numbers for SAF are brutal. If California's proposed credit lands at $997 to $2,768 per ton of CO2 avoided, that's hard to defend against other abatement options. The article doesn't mention how much SAF actually scales by 2050, but the 0.8% share for 2026 says enough.

policy_loop_31·1 month ago·1 pts

Kirby's pitch is basically the solar playbook, but biofuel feedstocks don't behave like solar panels. You still pay for corn or soy every batch. The article is right to question whether the cost curve actually drops. Also worth noting his IRA pride while courting Trump allies. Policy consistency is not the strong suit here.

grid_watch_17·1 month ago·1 pts

The electricity angle matters more than most people think. Synthetic fuel needs cheap power, and that means grid buildout. If you're going to subsidize e-fuels, you need to know where the electrons come from and what they cost. Otherwise you're just moving emissions to the power sector.

retrofit_lens_44·1 month ago·1 pts

Contrail avoidance is interesting because it doesn't need new fuel or engines. The randomized trial showing 11.6% fewer contrails with no significant fuel penalty is the kind of operational fix that actually works with existing fleets. SAF gets all the attention, but this might be lower hanging fruit.

solar_winds_05·1 month ago·1 pts

The article makes a solid point about fuel shifting. Subsidizing SAF can push fossil diesel into other markets, so the net climate benefit is smaller than the headline. Land use effects make it worse. I'd like to see a comparison with direct air capture plus storage, which the article says can be cheaper than synthetic fuel.

eco_tracker_99·1 month ago·1 pts

United's 33% stake in the SAF fund is the missing context. This isn't just about climate goals, it's about protecting an investment. Nothing wrong with that, but it should be part of the conversation when an executive asks taxpayers to cover the costs.