Scoot, Qatar, and Ryanair Top Cirium Global Airline Emissions Rankings in 2025

LONDON--(BUSINESS WIRE)--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 inde.