| 1 | AZI | Azzzurra Air S.p.A. | IATA: ZS, Callsign: Azzurra Air, IATA Prefix: 864, Ceased operations in March 2004. Designator ZS* reinstated by IATA | I | AVCODES |
| 2 | AZI | Air Zimbabwe Corporation | IATA: WX, Callsign: Air Zimbabwe, ICAO designator changed to AZW | ZW | AVCODES |
| 3 | AZI | Astra Airlines | IATA: A2, Callsign: Greek Star, Ceased operations on 14 November 2019. | GR | AVCODES |
| 4 | AZI | Azzurra Air | IATA: ZS | | ICAO1 |
| 5 | AZIA | AZTECA INTERNATIONAL AGENCIES INC | | | SCAC3 |
| 6 | AZIC | AMERITRANZ INC | | | SCAC4 |
| 7 | AZIM | AZIMUTH TRAVEL | | | SCAC3 |
| 8 | AZIM | AZIMUTH MARINE BV | | | SCAC4 |
| 9 | AZIT | ARIZONA INTERNATIONAL TRAVEL | | | SCAC3 |
