A coalition of European clean aviation firms has publicly urged the European Commission to extend the EU Emissions Trading System to international flights, ending a long-running tax break. The group argues the current exemption for international aviation must lapse by the end of 2026, bringing those flights into the scheme from January 2027. This move would generate substantial revenues for sustainable aviation infrastructure and domestic e-fuel production. Airlines oppose the expansion, citing ICAO’s CORSIA as a sufficient global tool, while clean-tech suppliers insist EU-level carbon pricing is essential for decarbonisation. The Commission’s upcoming review by 1 July 2026 will determine whether legacy carriers face higher carbon costs while emerging suppliers gain a predictable market signal.