| 1 | FF | Tower Air, Inc. | ICAO: TOW, Callsign: Tee Air, Ceased operation 10 October 2000. Designator FF recalled by IATA | USA | AVCODES |
| 2 | FF | Airshop B.V. | Designator FF* reinstated by IATA. Non-Airline Unit Load Devices (ULD) Companies | NL | AVCODES |
| 3 | FF | Africair Service | ICAO: FFB, Callsign: Foxtrot Foxtrot, Designator FF recalled by IATA | SN | AVCODES |
| 4 | FF | International Aviation Services Limited t/a IAS Cargo Airlines | Founded in 1967. Merged with Trans Meridian Air Cargo to form British Cargo Airlines on 15 August 1979. | GB | AVCODES |
| 5 | FFA | FFA Air-Travel | Callsign: Fairtravel, | CH | AVCODES |
| 6 | FFA | Avialesookhrana | | | ICAO1 |
| 7 | FFA | Flug- und Fahrzeugwerke Altenrhein | | CH | TRAFFIC |
| 8 | FFAE | FOXFIRE INC | | | SCAC4 |
| 9 | FFAG | FAST FORWARDING AGENCY INC | | | SCAC3 |
| 10 | FFAG | Furrer+Frey AG | | CH | VKM |
| 11 | FFAI | FINCHVILLE FARMS | | | SCAC4 |
| 12 | FFAL | FIFTH AVENUE LIMOUSINE SERVICE INC | | | SCAC3 |
| 13 | FFAM | FIRESTONE FARMS | | | SCAC4 |
| 14 | FFAN | FLORIDA FUEL TRANSPORTERS LLC | | | SCAC4 |
| 15 | FFAR | FENGER FARMS | | | SCAC4 |
| 16 | FFAS | FLYING FOX AIR SERVICE LLC | | | SCAC4 |
| 17 | FFAU | FLORENS ASSET MANAGEMENT COMPANY LIMITED | | HK | BIC |
| 18 | FFB | Africair Service | Callsign: Foxtrot Foxtrot, Designator FF recalled by IATA | SN | AVCODES |
| 19 | FFB | Africair Service | IATA: FF, Callsign: Foxtrot Foxtrot, Designator FF recalled by IATA | SN | AVCODES |
| 20 | FFB | Africair Service | | | ICAO1 |
| 21 | FFBI | FRANKLIN FREIGHT BROKERAGE INC | | | SCAC4 |
| 22 | FFBK | FIRST FUEL BANK | | | SCAC4 |
| 23 | FFBN | FUDGES FREIGHT BROKERAGE INC | | | SCAC4 |
| 24 | FFBX | Frank Fehr Brewing Co. | 7/1935 | | NAKINA |
| 25 | FFC | Synergy flight Training / Fairoaks Flight Centre | Callsign: Fairoaks, | GB | AVCODES |
| 26 | FFC | Fairoaks Flight Centre | | | ICAO1 |
| 27 | FFCB | F & F CHARTER BUS & TOURS CO INC | | | SCAC3 |
| 28 | FFCB | FESTE FURNITURE | | | SCAC4 |
| 29 | FFCD | FOSTER FINISH CORPORATION | | | SCAC4 |
| 30 | FFCG | FFC INTERNATIONAL CO LTD | | | SCAC4 |
| 31 | FFCH | FAIRFIELD CHEMICAL CARRIERS INC | | | SCAC4 |
| 32 | FFCL | FLYNN FARMS CLINTON LIMITED | | | SCAC4 |
| 33 | FFCM | FIERA FOODS COMPANY | | | SCAC4 |
| 34 | FFCO | FERMANICH FUEL CO INC | | | SCAC3 |
| 35 | FFCO | FERMANICH FUEL CO INC | | | SCAC4 |
| 36 | FFCP | FREIGHT FORWARDERS CORPORATION | | | SCAC4 |
| 37 | FFCQ | FIESTA FREIGHT CO INC | | | SCAC4 |
| 38 | FFCT | FRESH FOOD CONCEPTS INC | | | SCAC4 |
| 39 | FFCU | {LLC " SPECIAL CONTAINER LINES"};ZIPCODE=127055 | | RUS | BIC |
| 40 | FFCU | FINTRANS AB | | | SCAC3 |
| 41 | FFCW | FARRELL FORWARDING CO INC | | | SCAC4 |
| 42 | FFCX | Foremost International, S.A. | added 4/1968; 4/1970; eliminated 10/1970 | | NAKINA |
| 43 | FFCX | The Farmers Fertilizer Co. | 8/1920-1/1941 | | NAKINA |
| 44 | FFCX | Foremost International, S.A. | added 4/68; 4/70; eliminated 10/70 | | NRHS |
| 45 | FFCX | The Farmers Fertilizer Co. | Apr-38 | | NRHS |
| 46 | FFCX | *FARMER'S FERTILIZER CO. | | | PWRC |
| 47 | FFCX | *FOREMOST INTERNATIONAL, S.A. | | | PWRC |
| 48 | FFCY | FUTURE FORWARDING COMPANY | | | SCAC4 |
| 49 | FFCZ | FUNK FARMERS COOP | | | PWRC |
| 50 | FFD | Stuttgarter Flugdienst GmbH | Callsign: First Flight, Filed for bankruptvy in May 2019. | D | AVCODES |
| 51 | FFD | Rheinair | | D | AVCODES |
| 52 | FFD | Feuerwehriensatz | Callsign: Florian, | D | AVCODES |
| 53 | FFD | Stuttgarter Flugdienst | | | ICAO1 |
| 54 | FFDC | FARM FRESH DIRECT LLC | | | SCAC4 |
| 55 | FFDI | FALCON FORWARDING CO INC | | | SCAC3 |
| 56 | FFDL | FROZEN FOOD DELIVERY SERVICE INC | | | SCAC3 |
| 57 | FFDL | FAST FREIGHT DISTRIBUTORS LTD | | | SCAC4 |
| 58 | FFDN | FRENCHIES FORD INC | | | SCAC4 |
| 59 | FFDQ | FAIRBANKS FUEL DISTIBUTORS INC | | | SCAC4 |
| 60 | FFDS | F & F DISTRIBUTORS INC | | | SCAC3 |
| 61 | FFE | FFL Fachschule Fuer Luft-Fahrzeugfuehrer GmbH | Callsign: Smart Trainer, | D | AVCODES |
| 62 | FFEA | FOUR FOUR EIGHT TWO SIX NINE SEVEN | | | SCAC4 |
| 63 | FFEB | FLORES FLORES, ELIZABETH | | | SCAC4 |
| 64 | FFED | FIFTY FIFTY (50/50) EXPRESS EXPEDIT | | | SCAC4 |
| 65 | FFEE | FLEET FEET EXPRESS | | | SCAC3 |
| 66 | FFEE | FILATOFF FLORES, DAVID | | | SCAC4 |
| 67 | FFEF | FOUR FOUR EIGHT FOUR SEVEN TWO (448 | | | SCAC4 |
| 68 | FFEH | FUSION FREIGHT EXPRESS LLC | | | SCAC4 |
| 69 | FFEI | FREIGHT FORWARDERS EXCHANGE INC | | | SCAC3 |
| 70 | FFEJ | FAST FREIGHT EIGHT SIX (86) | | | SCAC4 |
| 71 | FFEL | FFE LOGISTICS INC | | | SCAC4 |
| 72 | FFEM | FENIX FIRE EXPRESS CORP | | | SCAC4 |
| 73 | FFEN | F & F ENTERPRISES INC | | | SCAC3 |
| 74 | FFEP | FAST FREIGHT EXPRESS INC | | | SCAC3 |
| 75 | FFEP | FASTFREIGHT EXPEDITORS LLC | | | SCAC4 |
| 76 | FFEQ | FLORIDA FURNITURE EXPRESS INC | | | SCAC4 |
| 77 | FFEST | Ffestiniog Railway | The Ffestiniog Railway is a 2ft (nom.) gauge railway in North Wales. It is probably the most famous and influential narrow gauge railway in the world! The railway was built to carry slate from the quarries in Blaenau Ffestiniog to the quays in Porthmadog. Without the railway it is doubtful that either of these places would have developed anywhere near to the extent they have today. At first a mixture of horse and gravity power was used, but horses were later replaced by steam power. The railway operated continuously from 1836 until it closed in 1946. It now operates as a preserved tourist line, reopening in stages from 1954 until 1982. | GB | TRAFFIC |
| 78 | FFET | FFE TRANSPORTATION SERVICES | | | SCAC3 |
| 79 | FFET | FARE FOODS TRUCKING | | | SCAC4 |
| 80 | FFEY | FEHRWAY FEEDS | | | SCAC4 |
| 81 | FFEZ | *FINLEY FARMERS ELEVATOR | | | PWRC |
| 82 | FFEZ | *FROZEN FOOD EXPRESS | | | PWRC |
| 83 | FFEZ | Frozen Food Express | | | RSRV |
| 84 | FFEZ | FROZEN FOOD EXPRESS | | | SCAC4 |
| 85 | FFF | Freedom Air Services Ltd. | Callsign: Inter Freedom, | WAN | AVCODES |
| 86 | FFF | Freedom Air Services | | | ICAO1 |
| 87 | FFFA | FIRST FREIGHT EXPRESS OF FORT ATKIN | | | SCAC4 |
| 88 | FFFB | F F F INC | | | SCAC4 |
| 89 | FFFC | FAITH FREIGHT FORWARDING CORP | | | SCAC3 |
| 90 | FFFD | FRESH FROZEN FOODS, LLC | | | SCAC4 |
| 91 | FFFG | FORDS FAST FREIGHT | | | SCAC3 |
| 92 | FFFH | FIVE FIVE FIVE (555) FREIGHT INC | | | SCAC4 |
| 93 | FFFI | FREDS FAST FREIGHT INC | | | SCAC3 |
| 94 | FFFL | FRONTLINE FREIGHT SYSTEMS OF FLORID | | | SCAC4 |
| 95 | FFFO | FAMILIES FIRST FORWARDERS INC | | | SCAC4 |
| 96 | FFFQ | FINCH AND FINCH FAST FREIGHT | | | SCAC3 |
| 97 | FFFR | FLEMING FAST FREIGHT INC | | | SCAC4 |
| 98 | FFFS | FAIRWAY FAST FREIGHT SERVICE | | | SCAC3 |
| 99 | FFFS | FAIRWAY FAST FREIGHT SERVICE | | | SCAC4 |
| 100 | FFFU | FAIRBREEZE SHIPPING CO LTD | | | SCAC3 |
