Save for later Print Download Share LinkedIn Twitter Turkish Airlines has ramped up its use of sustainable aviation fuel (SAF) and says it now uses SAF containing up to 87% less carbon than fossil jet one day a week on regular flights from Istanbul airport to Paris, Oslo, Gothenburg, Copenhagen, London and Stockholm. The flag carrier hinted at its increased SAF use in an Oct. 10 announcement that it had signed the Global SAF Declaration to completely decarbonize aviation by accelerating the development, production and consumption of SAFs. Other signatories are fuel supplier Shell, plane and engine makers Airbus, Rolls Royce and Safran as well as Singapore Airlines. The SAF used at Istanbul is made by Finland's Neste from used cooking oil and blended by Turkish Airlines' own fueling subsidiary Turkish Fuel Services.