| 1 | OPL | Air Cote D'opale, Sàrl | | F | AVCODES |
| 2 | OPL | Air Cote D'opale, Sàrl | Callsign: Air Opale, | F | AVCODES |
| 3 | OPLA | OCELOT PRIORITY LOGISTICS | | | SCAC4 |
| 4 | OPLC | OPTIMUS LLC | | | SCAC4 |
| 5 | OPLJ | OCEAN POINTS LOGISTICS LLC | | | SCAC4 |
| 6 | OPLM | OPTIMA LIMOUSINE SERVICE INC | | | SCAC3 |
| 7 | OPLM | ODYSSEY PERFORMANCE LIMITED | | | SCAC4 |
| 8 | OPLN | ON POINT LOGISTICS INC | | | SCAC4 |
| 9 | OPLQ | OAKLAND PORT LOGISTICS INC | | | SCAC4 |
| 10 | OPLT | ORIENTAL POWER LOGISTICS CO LTD | | | SCAC4 |
| 11 | OPLX | OREGON PACIFIC LINE, INC. | | | PWRC |
