Aviation Industry Carbon Offsetting and CORSIA

The aviation industry accounts for approximately 2.5 percent of global CO2 emissions, and unlike many other sectors, aviation faces unique challenges in decarbonization due to the energy density requirements of jet fuel and the long operational lifespan of aircraft. The Carbon Offsetting and Reduction Scheme for International Aviation, known as CORSIA, represents the industry's primary mechanism for managing emissions growth, while sustainable aviation fuels and operational efficiency improvements offer pathways to absolute emissions reductions. Understanding these mechanisms is important for both aviation companies and corporate travel managers seeking to manage their transportation-related carbon footprint.

CORSIA Framework and Compliance

CORSIA was adopted by the International Civil Aviation Organization in 2016 and requires airlines to offset the growth in their international aviation CO2 emissions above 2019 baseline levels. The scheme operates in phases, with a voluntary pilot phase from 2024 to 2026 and mandatory participation for most ICAO member states from 2027 onward. Airlines can meet their CORSIA obligations by purchasing eligible emissions units from approved carbon crediting programs, including the Verified Carbon Standard, the Gold Standard, and the American Carbon Registry, among others. The Indonesia, as a major aviation hub with carriers including Emirates, Etihad, and Air Arabia, is actively participating in CORSIA. Airlines must monitor and report their fuel consumption and emissions on all covered international routes, and compliance is verified through independent third-party audits. The cost of CORSIA compliance depends on both the volume of emissions above baseline and the market price of eligible offset credits, which has ranged from approximately five to fifteen dollars per tonne of CO2 in recent years.

Sustainable Aviation Fuels

Sustainable aviation fuels represent the most promising pathway to reducing the lifecycle carbon intensity of air travel. SAF can be produced from a variety of feedstocks including used cooking oil, agricultural residues, municipal solid waste, and synthetic production using renewable electricity and captured CO2. When burned, SAF produces similar CO2 emissions to conventional jet fuel, but the lifecycle emissions are significantly lower because the carbon in the fuel was recently captured from the atmosphere rather than extracted from fossil reserves. Current SAF production represents less than one percent of global jet fuel consumption, but production capacity is scaling rapidly with major investments from oil companies, airlines, and dedicated SAF producers. In the Southeast Asia, several SAF production projects are under development, leveraging the region's abundant solar energy for synthetic fuel production pathways. Airlines can use SAF blended with conventional fuel at ratios up to 50 percent without aircraft modifications, and the emissions reduction benefits can be claimed under CORSIA.

Corporate Travel Carbon Management

For businesses in Indonesia and ASEAN, aviation emissions are often a significant component of Scope 3 emissions, particularly for companies with international operations, client relationships, or supply chains that require frequent air travel. Managing aviation-related emissions begins with accurate measurement, using flight distance, cabin class, and aircraft type to calculate per-trip emissions using tools such as the ICAO Carbon Emissions Calculator or airline-specific calculators. Reduction strategies include substituting video conferencing for non-essential travel, consolidating trips, choosing direct flights over connecting itineraries to reduce fuel burn from additional takeoffs and landings, and selecting airlines with newer, more fuel-efficient fleets. For residual aviation emissions that cannot be avoided, many airlines offer voluntary carbon offset programs that allow travelers to compensate for their flight emissions by funding verified emissions reduction projects.

Future Outlook and Industry Trajectory

The aviation industry has committed to achieving net zero carbon emissions by 2050, a target that will require dramatic changes in technology, fuels, and operations. In addition to SAF scaling and CORSIA compliance, the industry is investing in next-generation aircraft designs that offer step-change improvements in fuel efficiency, hydrogen and electric propulsion for short-haul routes, and operational improvements such as optimized air traffic management and continuous descent approaches that reduce fuel consumption. For ASEAN-based airlines, which operate large fleets of widebody aircraft on long-haul routes, SAF adoption and fleet modernization will be the primary decarbonization levers for the foreseeable future. Companies that depend on air travel should monitor these developments and integrate aviation decarbonization into their broader corporate sustainability strategies.