| 1 | RTR | Sociedade Brasileira de Turismo (ROTASTUR) | IATA: DR, Callsign: Delta Romeo, ICAO callsign changed to Rotatur | BR | AVCODES |
| 2 | RTR | Air Trust JSC | Callsign: Air Trust, Founded Aug 2012. | KZ | AVCODES |
| 3 | RTR | Sociedade Brasileira de Turismo (ROTASTUR) | Callsign: Rotatur, ICAO callsign changed from Delta Romeo | BR | AVCODES |
| 4 | RTR | Rotatur | | | ICAO1 |
| 5 | RTRA | R AND D TRANSPORTATION | | | SCAC3 |
| 6 | RTRA | REINHARD TRANSPORTATION LLC | | | SCAC4 |
| 7 | RTRAN | RailTrans | | A | TRAFFIC |
| 8 | RTRB | ROSE TRUCK BROKERS INC | | | SCAC3 |
| 9 | RTRC | RICHMOND TERMINAL RAILWAY CO. | | | PWRC |
| 10 | RTRC | REED TRUCKING COMPANY INC | | | SCAC3 |
| 11 | RTRH | R T R TRUCKING INC | | | SCAC3 |
| 12 | RTRI | ROCOR TRUCK LINES INC | | | SCAC3 |
| 13 | RTRI | Railway Technical Research Institute | | J | TRAFFIC |
| 14 | RTRJ | R T R INC | | | SCAC4 |
| 15 | RTRK | ROBERTSON, T R TRUCKING INC | | | SCAC4 |
| 16 | RTRL | ROBERTS TRUCK RENTAL & LEASING INC | | | SCAC3 |
| 17 | RTRM | RAM TRUCKING INC | | | SCAC3 |
| 18 | RTRN | RICE TRANSPORTATION | | | SCAC3 |
| 19 | RTRO | RETROSPECT TRANSPORTATION INC | | | SCAC3 |
| 20 | RTRQ | RAFFAELE, T TRUCKING CORP | | | SCAC3 |
| 21 | RTRQ | RATE TRANSPORT CO INC | | | SCAC4 |
| 22 | RTRR | ROADTRAIN TRAILER REPAIR INC | | | SCAC3 |
| 23 | RTRR | ROADRUNNER TRANSPORTATION | | | SCAC4 |
| 24 | RTRT | ROSE TRAILER TOTERS | | | SCAC3 |
| 25 | RTRU | RÉVÉSZ TRANS KFT. | | H | BIC |
| 26 | RTRU | ROAD TRAILER RENTALS INCORPORATED | | | PWRC |
| 27 | RTRU | Road Trailer Rentals | | | RSRV |
| 28 | RTRV | RAM TOUR & TRAVEL | | | SCAC3 |
| 29 | RTRV | REEVES TRUCKING | | | SCAC4 |
| 30 | RTRW | REDDEN TRUCKING | | | SCAC3 |
| 31 | RTRX | Rocky Mountain Transportation Services | added 7/1995; 7/2000-7/2005 | | NAKINA |
| 32 | RTRX | E.I. du Pont de Nemours & Co., Inc. | added 7/1963; 7/1965; eliminated 1/1966 | | NAKINA |
| 33 | RTRX | E.I. du Pont de Nemours & Co., Inc. | added 7/63; 7/65; eliminated 1/66 | | NRHS |
| 34 | RTRX | Rocky Mountain Transportation Services | added 7/95; 7/2000 | | NRHS |
| 35 | RTRX | *E. I. DU PONT DE NEMOURS & CO., INC. | | | PWRC |
| 36 | RTRX | *RAILTOWN 1897 RAILROAD | | | PWRC |
| 37 | RTRX | +ROCKY MOUNTAIN TRANSPORTATION SERVICES | | | PWRC |
| 38 | RTRX | Rocky Mountain Transportation Services | | | RSRV |
| 39 | RTRX | ROCKY MOUNTAIN TRANSPORTATIN SERVIC | | | SCAC4 |
| 40 | RTRY | RICHARDSON TRUCKING | | | SCAC4 |
| 41 | RTRZ | ROAD TRAILER RENTALS LIMITED | | | PWRC |
| 42 | RTRZ | Road Trailer Rentals Limited | | | RSRV |
| 43 | RTRZ | ROAD TRAILER RENTALS, INC. | | | SCAC4 |
