Singapore-based Scoot has been named the world’s most emissions-efficient airline in Cirium’s 2025 EmeraldSky Annual Review
• Scoot, the Singapore-based low-cost carrier, claimed the top spot in Cirium’s 2025 EmeraldSky Annual Review.
• Qatar Airways, Ryanair, and Turkish Airlines recognized as most efficient global airlines when ranked by seat capacity.
• Regional leaders include Frontier (Intra-North America), Wizz Air (Europe), Virgin Atlantic (Transatlantic), Air Canada (Transpacific), JetSmart (Latin America), and Vietjet (Asia).
LONDON (Apr. 15, 2026) – Singapore-based Scoot has been named the world’s most emissions-efficient airline in Cirium’s 2025 EmeraldSky Annual Review, taking the top position from last year’s leader, Wizz Air. Qatar Airways, Ryanair, and Turkish Airlines were each recognized as the top three most efficient global airlines, ranked by available seat kilometres (ASK).
Cirium’s industry leading ranking is based on CO₂ per available ASK across the world’s 100 largest airlines. The methodology is independently assured by PwC to ISAE 3000. It groups airlines into Gold, Silver and Bronze tiers based on global performance, which covers the top 15 airlines as well as key regional and route performers.
/ “Airline emissions performance comes down to decisions airlines can control — fleet choices, seat configuration and how aircraft are deployed on routes,” said Jeremy Bowen, CEO of Cirium. “The airlines at the top of these rankings have got those fundamentals right, and it shows. Better emissions efficiency and lower fuel bills go hand in hand.” (....)