Isometric has received approval from the International Civil Aviation Organization (ICAO) to issue carbon credits under the Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA). Airlines can now use Isometric-verified carbon removal credits to meet their CORSIA obligations.
CORSIA is a UN-backed global framework that requires airlines to offset emissions from international flights above 2019 levels using approved carbon credits. The International Air Transport Association estimates airlines globally will require around 500 million tonnes of carbon removals annually by 2050 to achieve net zero emissions.
ICAO’s approval of Isometric provides airlines with access to the most scientifically rigorous and transparent credits on the market to meet their CORSIA obligations, while also unlocking additional supply for the scheme. This marks another step in the wider shift from low-quality offsets toward high-quality, verifiable carbon removal.
Approval under the scheme’s First Phase follows a comprehensive evaluation conducted by ICAO, which found that Isometric met its standards for transparency, scientific rigor, and environmental integrity.
Carrie Harris, British Airways’ Director of Sustainability, said, “Expanding the global carbon removals market is essential for aviation to achieve net zero emissions. ICAO’s recognition of Isometric for CORSIA compliance is a significant step, providing a credible pathway towards setting a long-term net zero goal. This move also creates a strong demand signal for carbon removal project developers and supports airlines in meeting their CORSIA obligations with credible carbon removals.”
British Airways is the UK’s largest purchaser of carbon removals and the largest airline purchaser globally, following its voluntary purchase in 2024 of a range of innovative carbon removals credits. By 2050, approximately one-third of the airline’s total emissions reductions are expected to come from carbon removals.
This builds on the Integrity Council for the Voluntary Carbon Market’s decision to approve six Isometric protocols to issue credits with the Core Carbon Principles (CCP) label—making Isometric the first and only registry to receive ICVCM approval for five of these pathways. These approvals further strengthen Isometric’s position as the world’s leading carbon removal registry.
If you’re interested in purchasing CORSIA-approved carbon removal credits—or are a supplier looking to issue them—get in touch.
