| 1 | FLR | Fleetair | Callsign: Fleetair, | ZA | AVCODES |
| 2 | FLR | FR Aviation Ltd. | Callsign: Rushton, ICAO designator changed to FRA. Name changed from Flight Refuelling Ltd. | GB | AVCODES |
| 3 | FLR | Flight Refuelling Ltd. | Callsign: Rushton, Name changed to FR Aviation Ltd. | GB | AVCODES |
| 4 | FLR | Fleetair | | | ICAO1 |
| 5 | FLR | Fife Lake Ry. Ltd. | eliminated 10/2006 | | NAKINA |
| 6 | FLR | FIFE LAKE RWY., LTD. | | | PWRC |
| 7 | FLR | FIFE LAKE RAILWAY LTD | | | SCAC4 |
| 8 | FLRA | FLORA TRUCKING INC | | | SCAC4 |
| 9 | FLRC | FLORILLI CORPORATION, THE | | | SCAC3 |
| 10 | FLRC | FLORILLI LOGISTICS LLC | | | SCAC4 |
| 11 | FLRD | FLORIDA EXPRESS LTD | | | SCAC4 |
| 12 | FLRE | FLORES TRUCKING | | | SCAC3 |
| 13 | FLRE | FLETES EXPRESS | | | SCAC4 |
| 14 | FLRF | FLEWELLING, R F LTD | | | SCAC4 |
| 15 | FLRG | FLETES RGC S A DE C V | | | SCAC4 |
| 16 | FLRI | FLAT RIVER FARMINGTON EXPRESS | | | SCAC3 |
| 17 | FLRI | FLORIMEX VANCOUVER INC | | | SCAC4 |
| 18 | FLRN | FLORIDA TRANSFER & STORAGE | | | SCAC4 |
| 19 | FLRO | FLYING KANGAROO DELIVERY INC | | | SCAC3 |
| 20 | FLRO | FLORES, ROBERTO | | | SCAC4 |
| 21 | FLRQ | FLORES TRUCKING | | | SCAC4 |
| 22 | FLRR | FALL RIVER EXPRESS LLC | | | SCAC4 |
| 23 | FLRT | FLORIDA ROCK & TANK LINES INC | | | SCAC3 |
| 24 | FLRU | FINNLINES PLC | | FIN | BIC |
| 25 | FLRU | OY FINNCARRIERS AB | | | SCAC3 |
| 26 | FLRU | FINNLINES PLC | | | SCAC4 |
| 27 | FLRW | FLORENCE, ROBERT E TRUCKING CO | | | SCAC4 |
| 28 | FLRX | ADM Transportation Co. | added 10/2002; 7/2005 | | NAKINA |
| 29 | FLRX | ADM Milling Co. | added 1/1994-7/2000; eliminated 10/2002 | | NAKINA |
| 30 | FLRX | Fabrica de Jabon ""La Rainera"", S.A. | 1/1950-10/1957; eliminated 1/1959 | | NAKINA |
| 31 | FLRX | Fabrica de Jabon "La Rainera", S.A. | 1/52-10/57; eliminated 1/59 | | NRHS |
| 32 | FLRX | ADM Milling Co. | added 1/94-7/2000 | | NRHS |
| 33 | FLRX | *FABRICA DE JABON 'LA RAINERA', S.A. | | | PWRC |
| 34 | FLRX | +ADM TRANSPORTATION CO. [ADM MILLING CO.] | | | PWRC |
| 35 | FLRX | ADM Milling | | | RSRV |
| 36 | FLRX | ADM TRANSPORTATION COMPANY | | | SCAC4 |
| 37 | FLRY | FLORY, RUSSELL TRUCKING INC | | | SCAC3 |
| 38 | FLRY | FLORES, REYMUNDA | | | SCAC4 |
| 39 | FLRY | Flat River Railway | Flat River Railway was spun off by PM in 1991 to run it's ex C&O Greenville-Lowell branch. | USA | TRAFFIC |
