| 1 | RMA | Rocky Mountain Airways | IATA: JC, Callsign: Rocky Mountain, Merged into Britt Airways to form Continental Express during 1991. Founded in 1963. Commenced operations in 1965. | USA | AVCODES |
| 2 | RMA | Rocky Mountain Airways | Callsign: Rocky Mountain, | USA | AVCODES |
| 3 | RMA | Rocky Mountain Airways | | | ICAO1 |
| 4 | RMAA | RAMZA INC | | | SCAC4 |
| 5 | RMAB | RODRIGUEZ, M TRANSPORTATION | | | SCAC4 |
| 6 | RMAC | ROMA CORPORATION | | | SCAC3 |
| 7 | RMAG | ROLAND MARKETING | | | SCAC4 |
| 8 | RMAH | R & M TRANSPORT INC | | | SCAC4 |
| 9 | RMAI | ROSS MACHINE & IRON WORKS INC | | | SCAC4 |
| 10 | RMAJ | RODRIGUEZ, MIGUEL ANGEL | | | SCAC4 |
| 11 | RMAK | ROMA TRANSPORT INC | | | SCAC3 |
| 12 | RMAL | REYES, MARIVEL | | | SCAC4 |
| 13 | RMAN | ROMANS TRANSPORTATION INC | | | SCAC3 |
| 14 | RMAN | RAMAN TRUCKING | | | SCAC4 |
| 15 | RMAQ | ROMA FOOD ENTERPRISES | | | SCAC3 |
| 16 | RMAQ | ROMA FOOD ENTERPRISES INC (VISTAR C | | | SCAC4 |
| 17 | RMAR | RAILMAR AGENCY LTD, s.r.o. | | CZ | VKM |
| 18 | RMAS | RAMIREZ & SONS | | | SCAC3 |
| 19 | RMAT | ROMA TRANSPORT SERVICE INC | | | SCAC3 |
| 20 | RMAV | R M I GLOBAL LOGISTICS INC | | | SCAC4 |
| 21 | RMAW | REM MARITIME AS | | | SCAC4 |
| 22 | RMAX | Rocky Mountain Rail Society | 7/2000-7/2005 (not listed) | | NAKINA |
| 23 | RMAX | American Refrigerator Transit Co. | added 4/1956; 10/1957-4/1970; eliminated 4/1974; 1/1975-1/1980 | | NAKINA |
| 24 | RMAX | American Refrigerator Transit Co. | 10/57-4/70; eliminated 4/74; 1/75-1/80 | | NRHS |
| 25 | RMAX | Rocky Mountain Rail Society | Jul-00 | | NRHS |
| 26 | RMAX | *AMERICAN REFRIGERATOR TRANSIT CO. | | | PWRC |
| 27 | RMAX | +ROCKY MOUNTAIN RAIL SOCIETY | | | PWRC |
| 28 | RMAX | Rocky Mountain Rail Society | | | RSRV |
| 29 | RMAX | ROCKY MOUNTAIN RAIL SOCIETY | | | SCAC4 |
| 30 | RMAY | REMINGTON MOVING AND STORAGE | | | SCAC4 |
