| 1 | AUZ | Australian Airlines Ltd. | IATA: AO, Callsign: Australian, Established in 2001. Commenced operations on 27 October 2002. Ceased operations on 30 June 2006. Low cost subsidiary of Qantas | AUS | AVCODES |
| 2 | AUZ | Aus-Air (Australian Air Charterers Pty Ltd.) | IATA: NO, Ceased operations | AUS | AVCODES |
| 3 | AUZ | Amaszonas Uruguay | IATA: Z7, Callsign: Uruguayo, Name changed to Amaszonas Uruguay d/b/a Cristalux SA | ROU | AVCODES |
| 4 | AUZ | Amaszonas Uruguay d/b/a Cristalux SA | IATA: Z7, Callsign: Uruguayo, Name changed from Amaszonas Uruguay. | ROU | AVCODES |
| 5 | AUZ | Australian Airlines | IATA: AO | | ICAO1 |
| 6 | AUZE | AUTHORIZED EXPRESS INC | | | SCAC3 |
