| 1 | AQU | AirQuarius Aviation | Callsign: Quarius, Founded in 1997. Ceased operations on 07 February 2012. | ZA | AVCODES |
| 2 | AQU | Aquair Luftfahrt GmbH & Co. | IATA: JI, Callsign: Aquair, | D | AVCODES |
| 3 | AQU | AirQuarius Aviation | | | ICAO1 |
| 4 | AQUA | AQUA GOLF CORPORATION | | | SCAC3 |
| 5 | AQUA | AQUA GULF CORPORATION | | | SCAC4 |
| 6 | AQUB | AQUA TREASURES LTD | | | SCAC4 |
| 7 | AQUC | AQUIS | | | SCAC4 |
| 8 | AQUE | AQUA-TECH INC | | | SCAC3 |
| 9 | AQUG | ACCOMPLISH QUILTING INC | | | SCAC4 |
| 10 | AQUI | AQUILA MARITME MANAGEMENT GMBH & CO | | | SCAC4 |
| 11 | AQUL | ALS QUALITY OIL COMPANY INC | | | SCAC4 |
| 12 | AQUM | AQUARIUS MARINE COMPANY | | | SCAC3 |
| 13 | AQUP | AQUA PENN | | | SCAC3 |
| 14 | AQUR | AQUATAUR INC | | | SCAC3 |
| 15 | AQUS | AQUARIUS TOURS INC | | | SCAC3 |
| 16 | AQUS | AQUASHIP LTD | | | SCAC4 |
| 17 | AQUT | AQUA TRAIN INC | | | SCAC3 |
| 18 | AQUU | AQUA EXPORT, INC. | | | SCAC3 |
| 19 | AQUU | AQUA EXPORT, INC. | | | SCAC4 |
| 20 | AQUV | A-ALERT COURIER SERVICE | | | SCAC4 |
