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Scoot tops Cirium’s 2025 EmeraldSky emissions-efficiency ranking; Qatar and Ryanair follow

Singapore-based Scoot was named the world’s most emissions-efficient airline in Cirium’s 2025 EmeraldSky Annual Review, recording 51 g CO2/ASK. Qatar and Ryanair placed next in Cirium’s global emissions ranking, reinforcing the link between modern fleet economics and lower unit emissions.

Discovered 2026-04-15T02:23:24.919696-07:00 | 2026-04-15T02:23:24.919696-07:00

Briefing

What Hype is tracking

  • Cirium’s EmeraldSky ranking turns emissions performance into a comparable metric (51 g CO2/ASK for the leader), giving operators a clear benchmark for fleet and operational efficiency decisions, building on broader fuel-and-cost tradeoff analyses like ultra-low-cost carriers’ fuel-efficient fleet gamble.
  • For strategy teams tracking how data is validated and shared, the ranking adds to Cirium’s growing role in market transparency following Biden-era rules expanding public access to U.S. airline data as Cirium publishes the first dataset.
  • The results also signal where competitive advantages are clustering—highlighting carriers that are translating efficiency investments into measurable emissions outcomes rather than just marketing sustainability.

Reported By

Business Traveller ala.aero aeromorning.com ukaviation.aero Frontier Airlines Business Wire
Sources Tracked
19
First Seen
2026-04-15T02:23:24.919696-07:00
Latest Update
2026-04-17T02:09:44.061591-07:00
Coverage
Aviation

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