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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 435 operators
| Name | IATA code | ICAO code | Country / Territory | Region | Expiry Date |
| WAMOS Air SA | EB | PLM | Spain | Europe | 30 March 2026 |
| West Air Co Ltd | PN | CHB | China (People's Republic of) | China & North Asia | 23 April 2025 |
| WestJet | WS | WJA | Canada | The Americas | 27 November 2024 |
| WestJet Encore | WR | WEN | Canada | The Americas | 3 December 2024 |
| 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 |