London Heathrow Airport has raised its target for alternative aviation fuel usage to 5.6 per cent of its total fuel mix in 2026, stepping beyond the UK government’s sustainable aviation fuel (SAF) mandate and intensifying its decarbonisation strategy.
The revised goal is two percentage points higher than the UK’s SAF mandate of 3.6 per cent for 2026, which was introduced in January last year and increased for this calendar year. It also marks a significant uplift from Heathrow’s previous target of 3 per cent for 2025.
Sustainable aviation fuel is widely viewed as one of the most immediate levers available to reduce aviation’s lifecycle carbon emissions. Unlike conventional jet fuel, SAF can deliver substantial carbon savings when assessed across production, distribution and use.
Heathrow stated that achieving its 5.6 per cent target in 2026 would reduce lifecycle carbon emissions from flights by more than 600,000 tonnes during the year.
The airport previously committed £86 million in incentives to encourage airlines to adopt alternative aviation fuels. It has not confirmed whether additional funding will be made available to support the higher 2026 target.
According to Heathrow, 17 per cent of global SAF supply in 2024 was used at the airport, a figure it cites as evidence of its leadership role in scaling alternative fuel adoption.
Matt Gorman, Heathrow’s director of sustainability, said: “Sustainable aviation fuel is not a hypothetical concept for the future, it’s already producing real impact in 2026.
“Heathrow is leading the way globally, with 17 per cent of the world’s SAF supply in 2024 used at the airport. SAF is a key lever on aviation’s journey to net zero by 2050, and a key element of Heathrow’s Net Zero Plan.”
The airport’s longer-term ambition includes reaching at least 11 per cent SAF usage by 2030, aligning with broader industry targets as airlines, fuel producers and governments work to accelerate production capacity.
For corporate travel buyers and sustainability leads, Heathrow’s announcement is significant. As Europe’s busiest international hub, its fuel strategy directly affects the carbon footprint of long-haul corporate travel.
While SAF currently commands a price premium over conventional jet fuel, greater adoption at scale could gradually support price normalisation and improved availability. For companies with science-based targets or net-zero commitments, the increased SAF blend at Heathrow provides a tangible emissions-reduction mechanism without requiring operational changes from travellers.
As regulatory pressure intensifies and environmental reporting becomes more rigorous, Heathrow’s move positions the airport ahead of the UK mandate, and signals a competitive shift among global hubs to demonstrate credible progress on decarbonisation.