| 1 | OWS | Cargosur | Callsign: Cargosur, | E | AVCODES |
| 2 | OWS | Cargosur | IATA: OW, Designator OW recalled by IATA. Now uses IB prefix. | E | AVCODES |
| 3 | OWSB | OWENS, BERT R | | | SCAC3 |
| 4 | OWSJ | OWENS, SAM J INC | | | SCAC3 |
| 5 | OWSL | OLD WORLD STONE LIMITED | | | SCAC4 |
| 6 | OWSN | OWENS NEW WORLD TRUCKING INC | | | SCAC3 |
| 7 | OWST | OWEN SOUND TRANSPORTATION COMPANY L | | | SCAC4 |
| 8 | OWSU | ODIS IRRIGATION EQUIPMENT LTD | | | SCAC4 |
| 9 | OWSX | Oil Well Supply Co. (1980) Ltd. | 7/2000-7/2005 (not listed) | | NAKINA |
| 10 | OWSX | Oil Well Supply Co. (1980) Ltd. | Jul-00 | | NRHS |
| 11 | OWSX | OIL WELL SUPPLY COMPANY (1980), LTD. | | | PWRC |
| 12 | OWSX | Oil Well Supply | | | RSRV |
