Sustainable Aviation Fuel Supplies Less Than 0.2% of Global Jet Fuel Demand

In 2023, global sustainable aviation fuel (SAF) production reached approximately 600 million liters — enough to cover roughly 0.15-0.2% of the aviation industry's total fuel consumption of about 350 billion liters per year. Airlines have collectively pledged to reach 10% SAF by 2030, which would require roughly 35 billion liters per year, a nearly 60-fold increase from current production levels in under six years. No credible analyst believes this target will be met. This matters because aviation is responsible for roughly 2.5% of global CO2 emissions (and 3.5% of total warming effect when accounting for contrails and NOx at altitude), and it is one of the hardest sectors to decarbonize. Electric planes are limited to short regional routes under 500 miles. Hydrogen aircraft are at least 15-20 years from commercial service. SAF — made from used cooking oil, agricultural residues, municipal waste, or eventually e-fuels — is the only scalable solution available within the next two decades for medium and long-haul flights. The pain is felt across the value chain. Airlines face SAF mandates (EU requires 2% in 2025, rising to 70% by 2050) but cannot source enough product. The primary SAF pathway today, HEFA (hydroprocessed esters and fatty acids), is constrained by feedstock availability — the global supply of used cooking oil and animal fats is finite and already contested by the biodiesel and renewable diesel industries. Airlines are competing with trucking companies and marine shippers for the same limited pool of waste fats and oils. The structural barrier is that building a SAF refinery takes 3-5 years and costs $500 million to $1 billion, with uncertain feedstock contracts and volatile policy environments. Investors need long-term offtake agreements from airlines, but airlines resist locking in prices 2-3 times higher than conventional jet fuel. Meanwhile, the alternative SAF pathways — alcohol-to-jet, gasification of municipal waste, power-to-liquid e-fuels — are all at earlier stages of commercialization with even higher costs. In the first place, the aviation industry delayed action on SAF for decades because jet fuel was cheap and carbon pricing for international aviation was politically impossible. CORSIA (the Carbon Offsetting and Reduction Scheme for International Aviation) was only agreed in 2016 and remains voluntary for many countries. By the time mandates began appearing in 2023-2025, the industry had a 30-year head start it needed but never invested in.