| 1 | ORN | Orient Airways | Callsign: Orient Liner, | PK | AVCODES |
| 2 | ORN | Orion Airways | IATA: KG, Callsign: Orion, Founded in 1979. Merged into Britannia Airways. | GB | AVCODES |
| 3 | ORN | Orange Air, LLC | IATA: O3, Callsign: Orange Jet, | USA | AVCODES |
| 4 | ORN | Orient Airways | | | ICAO1 |
| 5 | ORN | Oregon Railroad and Navigation Company | | USA | TRAFFIC |
| 6 | ORNB | ORANGEBURG MACHINE WORKS INC | | | SCAC3 |
| 7 | ORNB | ORION TRANSPORT CORPROATION | | | SCAC4 |
| 8 | ORNB | Omnibusverkehr Rhein-Nahe | Real: ORN | D | TRAFFIC |
| 9 | ORNE | ORNELAS RAMIREZ, LUSANA | | | SCAC4 |
| 10 | ORNE | Orange, Newark, and Elizabeth | | USA | TRAFFIC |
| 11 | ORNG | ORTIZ YANEZ, JOSE REFUGIO | | | SCAC4 |
| 12 | ORNK | ORION INTERMODAL TRANSPORTATION COR | | | SCAC4 |
| 13 | ORNL | ORIENTAL TRUCKING | | | SCAC3 |
| 14 | ORNT | ORION TRANSPORT INC | | | SCAC3 |
| 15 | ORNT | ORION TRANSPORT INC | | | SCAC4 |
| 16 | ORNU | ORANO CYCLE | | F | BIC |
