CORSIA, the international aviation industry's carbon offsetting mechanism, enters Phase 2 (2027–2035) with expanded participation from major economies (China, Russia, Brazil, India), driving global demand for eligible carbon credits (CEEUs) to 840–1,360 MtCO2. Thailand's aviation industry faces estimated offsets of 17–24 MtCO2, while CEEUs command premium pricing ($15–22/tCO2 currently, rising to $25–36/tCO2 by 2027). Thai project developers have a timely opportunity to upgrade domestic carbon projects—particularly coastal conservation and mangrove projects—to ICAO-approved standards, tapping into a projected $1.4–3.1 billion global market; however, Premium T-VER standards' status in Phase 2 remains under review by Q4 2026.