In the European Union, regulators are considering widening the scope of their Emissions Trading System to encompass not only flights between European nations but also those departing to international locations. Currently, the EU's Emissions Trading System (ETS) specifically targets flights within the European Economic Area. The new proposal aims to include emissions from all outbound flights from EU airports, which represents a substantial portion of emissions related to aviation.
A formal assessment is set for July 2026 to determine if the existing International Civil Aviation Organization's (ICAO) carbon offsetting scheme, known as CORSIA, justifies excluding international flights from the EU’s carbon pricing framework. Depending on the outcome, legislative changes may occur, potentially initiating these new measures by 2027.
The Commission has already imposed stricter measures on aviation emissions through its Fit for 55 climate initiative, slashing free carbon allowances for airlines substantially over the next few years.
The stakes are high for the aviation sector. Flights from EU airports alone produced approximately 195 million tons of CO2 in 2025, exceeding pre-pandemic levels. By expanding the ETS, the EU could bring an estimated additional 107 million tons of CO2 annually under carbon pricing, generating considerable revenue as allowance prices hover between 70 and 100 euros per ton.
A critical moment to consider is the EU's past attempt in 2012 to incorporate international flights into the ETS, which drew sharp criticism from several nations, ultimately leading to the suspension of those provisions. For the current proposal, incoming flights would likely remain exempt while emissions from departing flights would be captured. Airlines have already expressed concerns that increased costs from carbon pricing will be passed on to consumers, thereby raising ticket prices.
Environmentalist groups argue that implementing emissions pricing is not only fair but necessary, urging the EU to fully expand the ETS by 2027 to align with the polluter-pays principle. Revenue generated from the initiative is seen as critical for funding the transition to sustainable aviation fuels and cleaner technologies.
For investors, the full auctioning of carbon allowances by 2026 could signify that emissions will directly affect airline costs. If the ETS subsequently includes international departures, operational costs may rise further. This could ultimately influence ticket prices, reducing leisure travel demand, which is typically more responsive to price changes. Moreover, the shift may also affect cargo shipping rates.
With the anticipated addition of over 107 million tons of emissions to the ETS pool, the demand for carbon allowances will substantially increase. If the supply of allowances does not correspondingly grow, allowance prices could escalate within the current range or possibly exceed it.
Nevertheless, the geopolitical implications remain a significant concern. The EU's prior unilateral actions faced backlash from key countries. This time, the EU hopes that the recognition of CORSIA’s limitations will result in a more balanced response from the international community.