| 1 | OTL | South Airlines | IATA: YG, Callsign: Southline, Founded on 19 April 1999. AOC revoked in February 2013. IATA designator changed from V4* | UA | AVCODES |
| 2 | OTL | South Airlines | IATA: V4, Callsign: Southline, IATA designator changed to YG. Founded on 19 April 1999. | UA | AVCODES |
| 3 | OTL | South Airlines | | | ICAO1 |
| 4 | OTLA | O-TLAX TRANSPORT | | | SCAC4 |
| 5 | OTLD | OMEGA TOURS LTD | | | SCAC3 |
| 6 | OTLE | OVER THE LINE EXPRESS CORPORATION | | | SCAC3 |
| 7 | OTLF | ONDEROAD TRUCKING LLC | | | SCAC4 |
| 8 | OTLI | ONE ZERO SEVEN FOUR ZERO FIVE TWO ( | | | SCAC4 |
| 9 | OTLJ | OCTANS TANKERS LIMITED | | | SCAC4 |
| 10 | OTLK | OAKLINE TRANSPORTATION LLC | | | SCAC4 |
| 11 | OTLN | ORLANDO TOUR LINES | | | SCAC3 |
| 12 | OTLN | ONSITE LOGISTICS INC | | | SCAC4 |
| 13 | OTLO | ONFREIGHT LOGISTICS | | | SCAC4 |
| 14 | OTLP | OPTIMUM TRANSPORTATION LLC | | | SCAC4 |
| 15 | OTLQ | ON TIME LOGISTICS INTERNATIONAL INC | | | SCAC4 |
| 16 | OTLR | ONESOURCE TRANSFER LLC | | | SCAC4 |
| 17 | OTLS | ON TIME LOGISTICS CORPORATION | | | SCAC4 |
| 18 | OTLSA | Oradea Local Transport SA | | RO | TRAFFIC |
| 19 | OTLU | OVERLAND TOTAL LOGISTIC SERVICES (M) SDN BHD | | MAL | BIC |
| 20 | OTLU | OCEANS LEASING & LOGISTICS, LTD. | | | SCAC3 |
| 21 | OTLU | OCEANS LEASING & LOGISTICS, LTD. | | | SCAC4 |
| 22 | OTLW | OVERSEAS TAMPA LLC | | | SCAC4 |
| 23 | OTLY | OTLEY, ROBERT L | | | SCAC3 |
