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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 431 operators
| Name | IATA code | ICAO code | Country / Territory | Region | Expiry Date |
| White Airways SA | WI | WHT | Portugal | Europe | 29 May 2025 |
| Wideroes Flyveselskap AS | WF | WIF | Norway | Europe | 28 January 2026 |
| Wind Rose Aviation Company | 7W | WRC | Ukraine | Europe | 23 February 2026 |
| Wizz Air Hungary Airlines Ltd | W6 | WZZ | Hungary | Europe | 16 October 2025 |
| Wizz Air UK | W9 | WUK | United Kingdom | Europe | 7 November 2024 |
| World 2 Fly Portugal SA | 3P | WPT | Portugal | Europe | 29 June 2025 |
| World2fly | 2W | WFL | Spain | Europe | 12 November 2025 |
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Xiamen Airlines
The Operator’s Initial Registration Audit/ Renewal Audit has been performed as a full scope Hybrid Audit |
MF | CXA | China (People's Republic of) | China & North Asia | 5 March 2025 |
| YTO Cargo Airline | YG | HYT | China (People's Republic of) | China & North Asia | 22 March 2025 |
| Yunnan Lucky Air Company Limited | 8L | LKE | China (People's Republic of) | China & North Asia | 11 December 2025 |