| 1 | RGA | Region Air Pte. Ltd. | IATA: 7S, Callsign: Orchid, | SGP | AVCODES |
| 2 | RGA | Regency Aviation Services Ltd. | Callsign: Regency, | GB | AVCODES |
| 3 | RGA | Royal Ghanian Airlines Limited | Callsign: Royal Ghana, Ceased operations. | GH | AVCODES |
| 4 | RGA | Swiss Air Ambulance Ltd. (Helicopter Rescue Guard) | Callsign: Rega, | CH | AVCODES |
| 5 | RGA | Royal Ghanaian Airlines | | | ICAO1 |
| 6 | RGAB | RIGGLE, GARY TRUCKING | | | SCAC4 |
| 7 | RGAE | REGIONAL AIR EXPRESS INC | | | SCAC3 |
| 8 | RGAE | ROLLMARK TRUCKING INC | | | SCAC4 |
| 9 | RGAG | RIVERS GARAGE | | | SCAC4 |
| 10 | RGAI | REGIONAL TRUCKING CO INC | | | SCAC3 |
| 11 | RGAL | REGAL TRUCKING SERVICE CORP | | | SCAC3 |
| 12 | RGAL | REGAL TRANSPORT LTD | | | SCAC4 |
| 13 | RGAN | RANGER MARINE S A | | | SCAC3 |
| 14 | RGAN | RANGER MARINE S A | | | SCAC4 |
| 15 | RGAO | RGA TRANSPORT INC | | | SCAC4 |
| 16 | RGAP | RICHARD & GAIL AUTO TRANSPORT | | | SCAC3 |
| 17 | RGAR | REED, GARY | | | SCAC3 |
| 18 | RGAS | R G A TRANSPORTATION SYSTEMS | | | SCAC3 |
| 19 | RGAT | REGAL TRANSPORTATION INC | | | SCAC3 |
| 20 | RGAT | REGATTA TRANSPORTATION | | | SCAC4 |
