| 1 | FLG | Express Airlines 1, Inc. d/b/a Northwest Airlink | IATA: 9E, Callsign: Flagship, IATA Prefix: 430, Name changed to Pinnacle Airlines, Inc. d/b/a Northwest Airlink. Founded in 1985 | USA | AVCODES |
| 2 | FLG | Pinnacle Airlines, Inc. d/b/a Northwest Airlink | IATA: 9E, Callsign: Flagship, IATA Prefix: 430, Name changed to Endeavor Air, Inc. w.e.f. 01 August 2013. Name changed from Express Airlines 1, Inc. d/b/a Northwest Airlink w.e.f. 08 May 2002. | USA | AVCODES |
| 3 | FLG | American Flag Flying, Inc. | Callsign: Flag, | USA | AVCODES |
| 4 | FLG | Endeavor Air, Inc. | IATA: 9E, Callsign: Flagship, IATA Prefix: 430, ICAO designator change to EDV. ICAO callsign changed to Endeavor. Name changed from Pinnacle Airlines, Inc. d/b/a Northwest Airlink w.e.f. 08 May 2002. | USA | AVCODES |
| 5 | FLG | Flagship Airlines, Inc. | IATA: 8N, | USA | AVCODES |
| 6 | FLG | Big Charter Pvt. Ltd. d/b/a FlyBig | IATA: S9, Callsign: Krish, Commenced operations on 21 December 2020. | IND | AVCODES |
| 7 | FLG | Pinnacle Airlines | IATA: 9E | | ICAO1 |
| 8 | FLGA | FLANAGANS TOWING | | | SCAC3 |
| 9 | FLGB | FLOYD, GLEN | | | SCAC3 |
| 10 | FLGB | FINE LINE GROUP INC | | | SCAC4 |
| 11 | FLGC | FLEGAL TRUCKING & LOGISTICS INC | | | SCAC4 |
| 12 | FLGE | FLEGEL, S S TRUCKING CO | | | SCAC3 |
| 13 | FLGE | FULGER TRANSPORT INC | | | SCAC4 |
| 14 | FLGG | FLAGG, DAVE TRUCKING | | | SCAC3 |
| 15 | FLGI | FLEMINGS TRANSPORTATION INC | | | SCAC3 |
| 16 | FLGI | FLEMINGS TRANSPORTATION INC | | | SCAC4 |
| 17 | FLGJ | FERME LES GRANDS SOLEILS | | | SCAC4 |
| 18 | FLGL | FREIGHT LOGISTICS GROUP LLC | | | SCAC4 |
| 19 | FLGM | FLAG TRUCKING INC | | | SCAC3 |
| 20 | FLGO | FIELDINGS OIL CO INC | | | SCAC4 |
| 21 | FLGP | FLANAGAN TRANSPORTATION SERVICES IN | | | SCAC3 |
| 22 | FLGP | FLG EXPRESS INC | | | SCAC4 |
| 23 | FLGQ | FLEMING, F R | | | SCAC3 |
| 24 | FLGT | FLEMING TRANSPORT INC | | | SCAC3 |
| 25 | FLGV | FLAGSHIP LOGISTICS LLC | | | SCAC4 |
| 26 | FLGW | FULGHAM, RUSSELL W | | | SCAC3 |
| 27 | FLGW | FREIGHT LOGIC INC | | | SCAC4 |
| 28 | FLGX | Flamegas Transportation Systems, Inc. | 1/1975 | | NAKINA |
| 29 | FLGX | Flamegas Transportation Systems, Inc. | added 7/1974 | | NAKINA |
| 30 | FLGX | Flamegas Leasing Corp. | added 1/1974; eliminated 7/1974 | | NAKINA |
| 31 | FLGX | Flamegas Transportation Systems, Inc. | Jan-75 | | NRHS |
| 32 | FLGX | Flamegas Leasing Corp. | added 1/74 | | NRHS |
| 33 | FLGX | FLAMEGAS TRANSPORTATION SYSTEMS, INC. [FLAMEGAS LEASING CORP.] | | | PWRC |
| 34 | FLGY | FLORIDA GREYHOUND HAULING | | | SCAC3 |
| 35 | FLGZ | FLEXI-VAN LEASING | | | PWRC |
| 36 | FLGZ | Flexi-Van Leasing | | | RSRV |
| 37 | FLGZ | FLEXI-VAN LEASING INC | | | SCAC4 |
