The GBTA Foundation’s 2026 benchmark of 204 companies across 28 countries shows average travel sustainability maturity rising to 1.5 on a 0-5 scale, with APAC leading gains and the Americas losing ground.The GBTA Foundation’s 2026 benchmark of 204 companies across 28 countries shows average travel sustainability maturity rising to 1.5 on a 0-5 scale, with APAC leading gains and the Americas losing ground.