| 1 | RLN | Ruslan Airline | Callsign: Ruslan, | KZ | AVCODES |
| 2 | RLN | Aero Lanka (Pvt) Limited | IATA: QL, Callsign: Serendib, Designator QL reinstated by IATA. Name changed from Serendib Express. Name changed from Serendib Express (Pvt) Ltd. | CL | AVCODES |
| 3 | RLN | Aero Lanka (Pvt) Limited | Callsign: Aero Lanka, | CL | AVCODES |
| 4 | RLN | Aero Lanka | IATA: QL | | ICAO1 |
| 5 | RLNA | ROYAL LIMO & AIR PARCEL SERVICE | | | SCAC3 |
| 6 | RLNC | RELIANCE TRUCK COMPANY | | | SCAC3 |
| 7 | RLND | ROLAND MOVING & STORAGE | | | SCAC3 |
| 8 | RLNE | ROLANE TRANSPORTATION INC | | | SCAC4 |
| 9 | RLNK | ROAD LINK (DIV OF TAGART TRANSPORT | | | SCAC3 |
| 10 | RLNL | REDLINE LOGISTICS INC | | | SCAC4 |
| 11 | RLNO | RELIANCE TRANSPORT | | | SCAC4 |
| 12 | RLNS | R L TRANSIT INC | | | SCAC4 |
| 13 | RLNT | RELIANCE TRANSPORTATION INC | | | SCAC4 |
| 14 | RLNY | ROYAL LINES | | | SCAC3 |
| 15 | RLNZ | (CSXT) RETIRED 04-06-93 ATP (ACI 2355) | | | PWRC |
