| 1 | HU | Hainan Airlines Company Limited | ICAO: CHH, Callsign: Hainan, IATA Prefix: 880, Name changed to Hainan Airlines Holding Company Limited. IATA designator changed from HX | PRC | AVCODES |
| 2 | HU | Formosa Airlines Corp. | ICAO: FOS, Designator HU recalled by IATA. Formerly Yung Shing Airlines | RC | AVCODES |
| 3 | HU | Central Airlines (Nigeria) Limited. | ICAO: SEN, Callsign: Hotel Uniform, | WAN | AVCODES |
| 4 | HU | Hainan Airlines Holding Company Limited | ICAO: CHH, Callsign: Hainan, IATA Prefix: 880, Name changed from Hainan Airlines Company Limited. IATA designator changed from HX | PRC | AVCODES |
| 5 | HU | HUPAC SpA | | IT | VKM |
| 6 | HUA | Humber Aviation Ltd. | Callsign: Humber Air, | GB | AVCODES |
| 7 | HUAC | HUDSON ARMORED CAR & | | | SCAC4 |
| 8 | HUAF | HUA FENG (USA) LOGISTICS INC | | | SCAC4 |
| 9 | HUAF | Hungarian Air Force | Real: HUF | H | TRAFFIC |
| 10 | HUAI | HUNDER, MYLES | | | SCAC4 |
| 11 | HUAL | HUB AIRLINES INC | | | SCAC4 |
| 12 | HUAN | HUB CITY ATLANTA TERMINALS INC | | | SCAC4 |
| 13 | HUAU | HOEGH/UGLAND AUTOLINERS (HUAL) | | | SCAC1 |
| 14 | HUAU | HOEGH/UGLAND AUTO LINERS, A/S | | | SCAC4 |
| 15 | HUAV | HUNTER, AVERIL | | | SCAC4 |
| 16 | HUAX | Huasteca Petroleum Co. | 7/1930-4/1938 | | NAKINA |
| 17 | HUAX | Huasteca Petroleum Co. | Apr-38 | | NRHS |
| 18 | HUAX | HUASTECA PETROLEUM CO. | | | PWRC |
| 19 | HUB | Hub Airlines, Inc. | Callsign: Hub, | USA | AVCODES |
| 20 | HUB | Hub Airlines | | | ICAO1 |
| 21 | HUB | HUDSON BUS LINES | | | SCAC4 |
| 22 | HUBA | Hudson Bay | 1/1975-1/1980 | | NAKINA |
| 23 | HUBA | Hudson Bay | 1/75-1/80 | | NRHS |
| 24 | HUBA | BURLINGTON NORTHERN & SANTA FE RWY (BNSF) [HUDSON BAY CO. RR] | | | PWRC |
| 25 | HUBA | Hudson Bay (BNSF Railway) | | | RSRV |
| 26 | HUBB | HUB COMPUTER SOLUTIONS | | | SCAC4 |
| 27 | HUBD | HUB DISPLAYWORKS INC | | | SCAC4 |
| 28 | HUBERT | J. Hubert GmbH | | D | TRAFFIC |
| 29 | HUBF | HUB FREIGHT USA INC | | | SCAC4 |
| 30 | HUBG | HUDSON, BILLIE G | | | SCAC4 |
| 31 | HUBM | HUBBARD, BOB HORSE TRANSPORTATION I | | | SCAC4 |
| 32 | HUBO | HUB CITY TERMINALS INC | | | SCAC4 |
| 33 | HUBP | HUB INC | | | SCAC4 |
| 34 | HUBS | HUBBARDS TRANSPORTATION COMPANY | | | SCAC4 |
| 35 | HUBX | Hubbard Creamery Co. (North Western Refrigerator Line Co.) | 7/1935 | | NAKINA |
| 36 | HUBZ | HUBINGER COMPANY | | | PWRC |
| 37 | HUBZ | HUB GROUP INC | | | SCAC4 |
| 38 | HUC | Aerolineas de Tehuacan, S.A. de C.V. | Callsign: Lineas Tehuacan, | MEX | AVCODES |
| 39 | HUC | Aerloineas de Techuacan | | | ICAO1 |
| 40 | HUCA | HUTCHISON CARGO TERMINAL INC | | | SCAC4 |
| 41 | HUCE | HUTCHENS TRUCKING COMPANY INC | | | SCAC4 |
| 42 | HUCL | HUB CITY OF LOUISIANA TERMINALS INC | | | SCAC4 |
| 43 | HUCT | HUTCH TRANSPORTATION | | | SCAC4 |
| 44 | HUCX | Huron Portland Cement Co. | 7/1935-4/1961 | | NAKINA |
| 45 | HUCX | Huron Portland Cement Co. | 4/38-4/61 | | NRHS |
| 46 | HUCX | HURON PORTLAND CEMENT CO. | | | PWRC |
| 47 | HUCZ | HURON CHEMICAL | | | PWRC |
| 48 | HUD | Horizons Unlimited | Callsign: Hud, | USA | AVCODES |
| 49 | HUD | Air Hudik AB | Callsign: Air Hudik, | S | AVCODES |
| 50 | HUD | Horizons Unlimited | | | ICAO1 |
| 51 | HUDB | HUDSONS BAY COMPANY | | | SCAC4 |
| 52 | HUDC | HOUSTON DISTRIBUTING COMPANY INC | | | SCAC4 |
| 53 | HUDCB | | | GB | TRAFFIC |
| 54 | HUDCT | Huddersfield Corporation Transport | | GB | TRAFFIC |
| 55 | HUDG | HOUSTON, DOUG L | | | SCAC4 |
| 56 | HUDK | HUNTLAND TRUCKING | | | SCAC4 |
| 57 | HUDL | HUSKER DISTRIBUTION INC | | | SCAC4 |
| 58 | HUDM | HUDSON, GAY, MOVING AND STORAGE COM | | | SCAC4 |
| 59 | HUDMAN | Hudson & Manhattan | City: New York | USA | TRAFFIC |
| 60 | HUDN | HUDSON TRUCKING | | | SCAC4 |
| 61 | HUDR | HUDDLESTON, TROY TRUCKING LLC | | | SCAC4 |
| 62 | HUDS | HUDSON TRANSPORTATION CO INC | | | SCAC4 |
| 63 | HUDT | HUDINI TRANSPORTATION LTD | | | SCAC4 |
| 64 | HUDT | Hudson Transit | | US-NJ | TRAFFIC |
| 65 | HUDX | Hudson Technologies, Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 66 | HUDX | Hudson Technologies, Inc. | Jul-00 | | NRHS |
| 67 | HUDX | HUDSON TECHNOLOGIES INC | | | PWRC |
| 68 | HUDX | Hudson Technologies | | | RSRV |
| 69 | HUE | Haute Aviation | Callsign: Haute, | CH | AVCODES |
| 70 | HUEL | HUENEMAN LOGISTICS LC | | | SCAC4 |
| 71 | HUF | Hungarian Air Force | Callsign: Hungarian Airforce, | H | AVCODES |
| 72 | HUF | Hungarian Air Force | | | ICAO1 |
| 73 | HUFF | HUFFMAN TRUCKING | | | SCAC4 |
| 74 | HUFM | HUFFMAN, SCOTT | | | SCAC4 |
| 75 | HUFO | HUFFMAN OIL COMPANY INC | | | SCAC4 |
| 76 | HUGE | HUGUENOT ENERGY LLC | | | SCAC4 |
| 77 | HUGG | HUGGHINS TRANSPORTATION INC | | | SCAC4 |
| 78 | HUGH | HUGHES TRUCKING INC | | | SCAC4 |
| 79 | HUGI | HUDGINS TRUCKING INC | | | SCAC4 |
| 80 | HUGM | HUGO MESSENGER SERVICE INC | | | SCAC4 |
| 81 | HUGR | HURTIGRUTEN ASA | | | SCAC4 |
| 82 | HUGS | HUGHES TRUCKING & CONTRACTING | | | SCAC4 |
| 83 | HUGU | HUBE GLOBAL CO LTD | | | SCAC4 |
| 84 | HUHB | HUGHES BROTHERS TRANSPORTATION, INC | | | SCAC1 |
| 85 | HUHB | HUGHES BROTHERS TRANSPORTATION INC | | | SCAC4 |
| 86 | HUHE | HUGHES BROS INC | | | SCAC4 |
| 87 | HUHL | HUGHES & HILL INC | | | SCAC4 |
| 88 | HUI | Aero Huilango, S.A. de C.V. | Callsign: Huilango, | MEX | AVCODES |
| 89 | HUJC | HUNT, J C COMPANY INC | | | SCAC4 |
| 90 | HUK | Hungarian-Ukranian Airlines Ltd. | Callsign: Big Bird, | H | AVCODES |
| 91 | HUKB | Hümmlinger Kreisbahn | | D | TRAFFIC |
| 92 | HUKD | HUSKINS, D C & SONS TRUCKING | | | SCAC4 |
| 93 | HUKG | HUNTER TRUCKING INC | | | SCAC4 |
| 94 | HUKU | HUKTRA NV | | B | BIC |
| 95 | HUKU | HUKTRA (UK) LIMITED | | | PWRC |
| 96 | HUKU | Huktra | | | RSRV |
| 97 | HUKU | HUKTRA NV | | | SCAC4 |
| 98 | HULG | HULL TRUCKING INC | | | SCAC4 |
| 99 | HULJ | HULL, JOHN TRUCKING | | | SCAC4 |
| 100 | HULL | HULL TRANSPORT LTD | | | SCAC4 |
