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TUI Group has significantly increased its use of Sustainable Aviation Fuel (SAF) as part of its emissions reduction strategy. In 2021, TUI's airline operations consumed approximately 11,262 tonnes of SAF, a six-fold increase from about 1,700 tonnes in 2024.

SAF is blended with conventional jet fuel and is produced from sustainable feedstocks to lower total lifecycle CO₂ emissions. TUI aims to achieve net-zero emissions through operational efficiencies and enhanced sustainability compliance across its portfolio, including hotels and cruise lines.

TUI Cruises has also begun using liquid biogas to reduce emissions. The aviation industry is under pressure to adopt low-carbon fuels, with SAF currently representing only an estimated 0.3% of total jet fuel consumption. TUI plans further expansion of SAF use and is exploring new technologies and partnerships to enhance fuel efficiency and reduce carbon emissions.