Scoot Named World's Most Emissions-Efficient Airline of 2025

Singapore's budget airline, Scoot, has ascended to the top ranks as the world's most emissions-efficient airline, as reported by Cirium's 2025 EmeraldSky annual evaluation.

Remarkably, this marks the first time a Southeast Asian carrier has clinched the number one spot globally. Scoot stood out with a recorded CO2 per available seat kilometre (ASK) of 51 grams, surpassing last year's leader, Wizz Air.

This achievement is attributed to Scoot's high seat density and extended flight sectors. The results affirm a larger industry trend, with airlines operating newer fleets and higher seat densities consistently excelling in emissions efficiency. Cirium's rankings are independently assured by PwC and cover the world's 100 largest airlines.