| 1 | OEL | Ontario Express Ltd. | IATA: 9X, Callsign: Partner, Canadian Partner | CDN | AVCODES |
| 2 | OELD | OAHU EXPRESS LTD | | | SCAC4 |
| 3 | OELE | ORLANDO ENTERPRISE LLC | | | SCAC4 |
| 4 | OELL | OTTOMAN ENTERPRISES LLC | | | SCAC4 |
| 5 | OELN | ONTIME EXPRESS LINE INC | | | SCAC4 |
| 6 | OELX | O.E. Linsin, Inc. | 7/1935-4/1970; eliminated 4/1974 | | NAKINA |
| 7 | OELX | O.E. Linsin, Inc. | 4/38-4/70; eliminated 4/74 | | NRHS |
| 8 | OELX | O.E. LINSIN, INC. | | | PWRC |
| 9 | OELX | LINSIN INC, OE | | | SCAC3 |
