The airline said the flight’s CO2 emissions had reduced by 62% compared to a similar experiment taking place in 2010.
The latest trial comes as aviation works hard on its image ahead of November’s UN climate summit in Glasgow.
Domestic aviation will be under a particular spotlight, as train company LNER estimates the London-Glasgow journey by rail would emit 0.06 kg of CO2 per passenger mile, with car travel at 0.17, but air travel far higher at 0.4kg – 6.66 times as much as train travel.
BA’s flight was operated by the latest Airbus A320neo, which is 20% more fuel efficient than the former A320 model and 50% quieter, according to the manufacturer. It was powered with a blend of 35% Sustainable Aviation Fuel, with remaining emissions from the conventional kerosene being offset.
Environmental gains were also made using electric tugs to push back, with Heathrow powering these with renewable energy. A single engine was then used to taxi to the runway.
Once airborne, air traffic control cleared the flight for a direct routing and continuous climb and descent to save fuel, a practice made easier in the pandemic when the skies are not as crowded.
However, Martin Rolfe, chief executive of air navigation provider Nats, said: “Live demonstrations like this show just what is possible and are an important step on the aviation industry’s path to net zero by 2050.
“We can learn a lot from flights like these, as they help us understand how to redesign the airspace over the UK and play our part in making flying sustainable for the future.”
British Airways chairman and chief executive Sean Doyle added: “This flight offered a practical demonstration of the progress we’re making in our carbon reduction journey. By working together with our industry partners we’ve delivered a 62% improvement in emissions reductions compared to a decade ago.”
