Last month we examined Ethiopia's aviation emissions; this month, we turn to Europe to focus on Hungary.
Please note as this report is derived from scheduled flight data, emissions linked to the Gulf region may not fully reflect actual flying activity, especially in relation to flight cancellations.
Focus market on this month's report: Hungary
Highlights from this month’s report include:
- Global passenger related aviation emissions in April 2026 were estimated to be 65 million tonnes, 62% of these emissions remain outside formal compliance schemes
- Total emissions reached 262 million tonnes CO2 YTD, 4 million tonnes above last year (258M) and marginally exceeding 2019 levels (261M).
- YTD several mature markets remain below pre-pandemic levels, including the US (-2%), UK (-7%), Japan (-6%), and Germany (-18%),
Spotlight on Hungary
- In April 2026, Hungary ranks as the 63rd largest market for passenger-related aviation emissions.
- Emissions are concentrated at Budapest Airport, with airline operations from other airports contributing only minimal volumes.
- Hungary demonstrates relatively efficient operations, with airline operations from Budapest recording 59g CO2 per ASK
- Wizz Air has the lowest emissions per ASK
Download this month’s report here
CARE Index
The RDC CARE Index scores any air route, airline and aircraft combination between 0 (worst) and 10 (best) based on fuel burn, seat capacity and load factor, use of sustainable aviation fuel, participation in compliance programmes such as EU ETS, and whether the carrier offsets emissions. It's designed to give both consumers and industry a clear, comparable measure of airline sustainability.
Here are the highest-scoring carriers by region in April 2026:
Europe
- La Compagnie 7.9
- Wizz Air UK 7.8
- Smartwings Slovakia 7.6
- Norra Nordic Regional Airlines 7.6
- Marabu Airlines 7.4
North America
- Flair Airlines 6.9
- Air Transat 6.8
- Frontier Airlines 6.8
- Porter Airlines Canada 6.5
- Volaris 6.4
Asia
- UTair Aviation 7.2
- IndiGo 7.1
- Myanmar Airways International 6.9
- Air Premia 6.9
- Myanmar National Airlines 6.8
Rest of the World
- FlyGabon 8.0
- Arajet 7.1
- Fiji Airways 7.0
- Clic Air S.A. 6.9
- flydubai 6.7
Full CARE Index rankings across all carriers and regions are available in the full report
Our CO2 data which powers our monthly report has been independently audited and verified and is available via our Scope 3 emissions platform, as a dataset, via an API or as part of a subscription to Apex
Our Scope 3 emissions platform has been developed to allow airports to accurately report upon aviation scope 3 emissions and has now been verified against Airport Carbon Accreditation (ACA) requirements. If you’d like to find out more get in touch with our team today to discover how RDC can provide the insights you need to stay ahead of environmental regulations and improve your sustainability efforts.
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Banner image by Leonhard Niederwimmer on Unsplash
