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The IATA Operational Safety Audit (IOSA) is the benchmark for global safety management in airlines. All IATA members are registered and must remain registered in order to maintain IATA membership. See the applicability of IOSA standards and recommended practices (ISARPs).
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Found 434 operators
| Name | IATA code | ICAO code | Country / Territory | Region | Expiry Date |
| Tassili Airlines | SF | DTH | Algeria | Africa & Middle East | 11 February 2025 |
| TATA SIA Airlines Limited (Vistara) | UK | VTI | India | Asia Pacific | 1 September 2024 |
| Thai AirAsia X | XJ | TAX | Thailand | Asia Pacific | 10 August 2024 |
| Thai Airways International Public Company Limited | TG | THA | Thailand | Asia Pacific | 28 May 2025 |
| Thai Lion Air | SL | TLM | Thailand | Asia Pacific | 29 May 2025 |
| Thai Smile Airways | WE | THD | Thailand | Asia Pacific | 15 September 2024 |
| Tianjin Airlines Co Ltd | GS | GCR | China (People's Republic of) | China & North Asia | 1 April 2025 |
| Tibet Airlines Co Ltd | TV | TBA | China (People's Republic of) | China & North Asia | 17 November 2025 |
| Titan Airways Ltd | ZT | AWC | United Kingdom | Europe | 10 August 2024 |
| ToMontenegro DOO | MNE | Montenegro | Europe | 22 April 2026 |