| 1 | RLX | Aerolux Air Company, Open Joint Stock Company | Callsign: Aerolux, | UA | AVCODES |
| 2 | RLX | Go2Sky spol s.r.o. | IATA: 6G, Callsign: Relaxair, | SK | AVCODES |
| 3 | RLX | Richardson Lubricating Co. | 7/1932 | | NAKINA |
| 4 | RLX | RICHARDSON LUBRICATING CO. | | | PWRC |
| 5 | RLX | Go2Sky | | SK | TRAFFIC |
| 6 | RLXC | RED LINE EXPRESS LLC | | | SCAC4 |
| 7 | RLXD | RETAIL EXPRESS DELIVERY INC | | | SCAC4 |
| 8 | RLXE | RAIL EXPRESS INC | | | SCAC3 |
| 9 | RLXG | RED LINE EXPRESS | | | SCAC3 |
| 10 | RLXG | RITE LOGISTIX INC | | | SCAC4 |
| 11 | RLXI | RAIL EXPRESS INC | | | SCAC3 |
| 12 | RLXL | REAL - TRANS LLC | | | SCAC4 |
| 13 | RLXP | RELIABLE EXPRESS INC | | | SCAC3 |
| 14 | RLXR | R & L EXPRESS TRUCKING CORP | | | SCAC3 |
| 15 | RLXS | RELIABLE EXPRESS | | | SCAC3 |
| 16 | RLXU | CARU CONTAINERS BV | | NL | BIC |
