'Irresponsible Growth': Emissions From European Flights Rose Above Pre-Pandemic Levels in 2025

Why It Matters

The surge signals that aviation’s carbon footprint is rebounding, prompting tighter EU climate policies and higher cost pressures for airlines. It underscores the urgency for the sector to adopt Sustainable Aviation Fuel and other decarbonisation measures.

Key Takeaways

• European flight emissions up 2% vs 2019, surpassing pre‑COVID levels
• Low‑cost carriers, especially Ryanair, drove most of the emissions rise
• Ryanair's global emissions now 50% higher than in 2019
• EU may tighten Sustainable Aviation Fuel mandates to curb aviation carbon growth
• Rising emissions could trigger higher climate policy costs for airlines

Pulse Analysis

The European aviation sector has slipped back into a carbon‑intensive trajectory, with 2025 emissions from flights departing EU airports rising 2 percent above 2019 levels, according to the latest monitoring data. The rebound marks the first time since the pandemic that the industry has exceeded its pre‑COVID footprint, erasing the modest gains achieved through reduced traffic in 2020‑21. Analysts point to an aggressive expansion by low‑cost carriers, whose business models rely on high seat‑turnover and thin margins, as the primary driver of the uptick. The data, compiled by the European Aviation Environmental Report, also shows a 1.5 percent rise in average fuel burn per passenger kilometre, indicating lower efficiency gains.

This emissions resurgence arrives as European regulators tighten the Sustainable Aviation Fuel (SAF) mandate and extend the EU Emissions Trading System to cover international flights. The BloombergNEF forecast of $48 billion in additional climate‑policy costs by 2035 underscores the financial pressure mounting on airlines that have not yet diversified away from fossil kerosene. Ryanair, the continent’s largest low‑cost operator, now reports global emissions 50 percent higher than in 2019, a stark illustration of how growth without decarbonisation can quickly become a liability. If airlines fail to meet the 2 percent annual reduction target set for 2030, they could face double‑digit penalties under the revised EU ETS.

Investors and policymakers are therefore urging a faster shift toward SAF, electric propulsion and more efficient flight operations. Several EU member states are piloting SAF production hubs, while airlines are experimenting with carbon‑offset programmes that meet the forthcoming UK carbon‑budget inclusion of international aviation. The sector’s ability to align rapid passenger growth with credible climate strategies will determine whether it can avoid punitive taxes and retain consumer confidence in an increasingly green‑conscious market. Moreover, corporate travel policies are tightening, with many firms requiring SAF‑certified flights, further nudging airlines toward greener fleets.