| 1 | FDE | Federico II Airways, S.p.A. | Callsign: Federeagle, Designator 2D* recalled by IATA | I | AVCODES |
| 2 | FDE | Federico II Airways, S.p.A. | IATA: 2D, Callsign: Federeagle, Ceased operations. Designator 2D* recalled by IATA | I | AVCODES |
| 3 | FDE | Federico II Airways, S.p.A. | IATA: X8, Callsign: Federeagle, IATA designator changed to 2D | I | AVCODES |
| 4 | FDE | Federal Express Corporation (Fedex) | IATA: MB, Callsign: Express, ICAO designator changed to FDX | USA | AVCODES |
| 5 | FdE | Freunde der Eisenbahn e.V. | Hamburg | D | privat-bahn.de |
| 6 | FDE | FedEx Express | | | SCAC2 |
| 7 | FDE | Federico II airways | | I | TRAFFIC |
| 8 | FDEB | FEDEX GROUND (2ND BAR CODE) | | | SCAC4 |
| 9 | FDEC | FEDEX GROUND (RETAIL LABEL DIVISION | | | SCAC4 |
| 10 | FDEG | FedEx Ground | | | SCAC2 |
| 11 | FDEG | FEDEX GROUND (CORPORATE) | | | SCAC4 |
| 12 | FDEI | FRONTIER FREIGHTWAYS | | | SCAC3 |
| 13 | FDEI | FRONTIER FREIGHTWAYS | | | SCAC4 |
| 14 | FDEK | FRINK, DEAN TRANSPORTATION | | | SCAC4 |
| 15 | FDEN | FEDEX CORP (GENERAL PURPOSE) | | | SCAC4 |
| 16 | FDEP | FUEL DEPOT INC | | | SCAC4 |
| 17 | FDER | FREDERICKS, NIEVES C | | | SCAC3 |
| 18 | FDET | FEDERAL TRUCKING COMPANY INC | | | SCAC3 |
| 19 | FDEV | FLETCHER, DEVON | | | SCAC4 |
| 20 | FDEX | Fruit Growers Express Co. | 7/1937-4/1970; eliminated 10/1974; 1/1975 | | NAKINA |
| 21 | FDEX | Fruit Growers Express Co. | 4/38-4/70; eliminated 10/74; 1/75 | | NRHS |
| 22 | FDEX | FRUIT GROWERS EXPRESS CO. | | | PWRC |
