| 101 | HLDW | HAKAI LODGE INC | | | SCAC4 |
| 102 | HLDY | HOLIDAY TRUCKING | | | SCAC4 |
| 103 | HLE | First Air | Callsign: Helimed, Name changed to UK HEMS | GB | AVCODES |
| 104 | HLE | UK HEMS | Callsign: Helimed, Name changed from First Air | GB | AVCODES |
| 105 | HLE | UK HEMS | | | ICAO1 |
| 106 | HLEB | HOEGH LNG AS | | | SCAC4 |
| 107 | HLEC | HEAVY LOADS EXPRESS LLC | | | SCAC4 |
| 108 | HLEF | LEIF HOEGH & CO A/S | | | SCAC3 |
| 109 | HLEF | LEIF HOEGH & CO A/S | | | SCAC4 |
| 110 | HLEL | HOLLAND EQUIPMENT LIMITED | | | SCAC4 |
| 111 | HLEN | HILLS ENTERPRISES INC OF SOUTHWESTE | | | SCAC4 |
| 112 | HLEP | HAMMER LANE EXPRESS | | | SCAC4 |
| 113 | HLEQ | HOOD LOGGING EQUIPMENT | | | SCAC4 |
| 114 | HLEU | SHIHLIEN FINE CHEMICALS CO. LTD. | | RC | BIC |
| 115 | HLEX | Flint Hills Resources LP | added 1/2009 | | NAKINA |
| 116 | HLEX | Huntsman Polymers Corp. | added 7/2002; 7/2005; eliminated 1/2009 | | NAKINA |
| 117 | HLEX | Huntsman Corp. | added 4/2002; eliminated 7/2002 | | NAKINA |
| 118 | HLEX | Huntsman Polymers Corp. | 7/2000 (not listed); added 1/2001; eliminated 4/2002 | | NAKINA |
| 119 | HLEX | Huntsman Polymers Corp. | 7/2000; added 1/2001 | | NRHS |
| 120 | HLEX | HUNTSMAN POLYMERS CORP. | | | PWRC |
| 121 | HLEX | Hunstman Polymers Corporation | | | RSRV |
| 122 | HLEX | BRASKEM AMERICA INC | | | SCAC4 |
| 123 | HLEY | HALEY INDUSTRIES LTD | | | SCAC4 |
| 124 | HLF | Hapag Lloyd Fluggessellschaft mbH | IATA: HF, Callsign: Hapag Lloyd, IATA Prefix: 617, Name changed to TUIfly GmbH. ICAO callsign changed to Tuifly. | D | AVCODES |
| 125 | HLF | TUIfly GmbH | IATA: HF, Callsign: Hapag Lloyd, IATA Prefix: 617, Name changed from Hapag Lloyd Fluggessellschaft mbH. IATA designator changed to X3* w.e.f. 01 October 2010. ICAO designator changed to TUI w.e.f. 01 October 2010. | D | AVCODES |
| 126 | HLF | Homeland Airlines Co., Ltd. | Callsign: Homeland, Name changed to Central Airlines Co., Ltd. | PRC | AVCODES |
| 127 | HLF | Central Airlines Co., Ltd. | IATA: I9, Callsign: Homeland, IATA Prefix: 959, Name changed from Homeland Airlines Co., Ltd. Also known as Zhongzhou Airlines. | PRC | AVCODES |
| 128 | HLF | Hapagfly | IATA: HF | | ICAO1 |
| 129 | HLFC | HILLTOP FUEL CO INC | | | SCAC4 |
| 130 | HLFL | HARBOUR LIGHT FISHERIES (1993) LIMI | | | SCAC4 |
| 131 | HLFN | H L FUEL CO INC | | | SCAC4 |
| 132 | HLG | Helog AG, Helikoptertransporte | Callsign: Helog, | CH | AVCODES |
| 133 | HLG | Helog | | | ICAO1 |
| 134 | HLG | Holzlogistik und Güterbahn GmbH | Bebra | D | privat-bahn.de |
| 135 | HLGC | HAYNES LOGISTICS | | | SCAC4 |
| 136 | HLGF | HOLLISTON LOGISTICS LLC | | | SCAC4 |
| 137 | HLGI | HUNTER EXPRESS LTD | | | SCAC4 |
| 138 | HLGK | HEDRICK LOGISTICS SPECIALISTS INC | | | SCAC4 |
| 139 | HLGN | HILL GRAIN INC | | | SCAC4 |
| 140 | HLGR | HARRAH LOGISTICS GROUP INC | | | SCAC4 |
| 141 | HLGS | HART LOGISTICS | | | SCAC4 |
| 142 | HLGU | HAEFELI AG | | CH | BIC |
| 143 | HLGX | HELM Financial Corp. | added 7/1998; 7/2000-7/2005 | | NAKINA |
| 144 | HLGX | HELM Financial Corp. | added 7/98; 7/2000 | | NRHS |
| 145 | HLGX | HELM FINANCIAL CORPORATION | | | PWRC |
| 146 | HLGX | Helm Financial Corporation | | | RSRV |
| 147 | HLH | Hala Air Co. | Callsign: Hala Air, | SUD | AVCODES |
| 148 | HLH | Hala Air | | | ICAO1 |
| 149 | HLHC | HILLSIDE HAULING INC | | | SCAC4 |
| 150 | HLHE | HLH EXPRESS INC | | | SCAC4 |
| 151 | HLHG | HOLTZ, HUGH | | | SCAC4 |
| 152 | HLHL | HILL AND HILL TRANSPORT | | | SCAC4 |
| 153 | HLHU | HEUNG-A LINE CO LTD | | ROK | BIC |
| 154 | HLHU | HORN LINIE | | | SCAC4 |
| 155 | HLI | Heli Securite Helicopter Airline | IATA: H4, Callsign: Heli Saint-Tropez, Designator H4 recalled by IATA. | F | AVCODES |
| 156 | HLI | Heli Securite Helicopter Airline | IATA: HS, Callsign: Heli Saint-Tropez, Designator H4 recalled by IATA. | F | AVCODES |
| 157 | HLI | Heli Securite | | | ICAO1 |
| 158 | HLIA | HOLLIS TRANSPORT AGENCY INC | | | SCAC4 |
| 159 | HLIB | HTL LOGISTICS INC | | | SCAC4 |
| 160 | HLIC | HURST LOGISTICS INC | | | SCAC4 |
| 161 | HLID | HURST LOGISTICS INC (WAREHOUSE) | | | SCAC4 |
| 162 | HLIG | HALL, ROBERT ORIGINALS | | | SCAC4 |
| 163 | HLIH | HOLT LOGISTICS INC | | | SCAC4 |
| 164 | HLII | HARMEL IMPLEMENT INC | | | SCAC4 |
| 165 | HLIQ | HULLISON & SON CARTAGE, INC | | | SCAC1 |
| 166 | HLIV | HEINS LOGISTICS INC | | | SCAC4 |
| 167 | HLIX | Hudson Logistics, Inc. | added 4/2007; eliminated 10/2009 | | NAKINA |
| 168 | HLIX | HUDSON LOGISTICS, INC. | | | PWRC |
| 169 | HLIX | HUDSON LOGISTICS INC | | | SCAC4 |
| 170 | HLJ | All Seasons Air Pacific, Inc. | Callsign: All West, | USA | AVCODES |
| 171 | HLJ | Hello Jets S.r.l. | IATA: H3, Callsign: Hellojets, Subsidiary of Blue Air's owner Teodor Rada. | RO | AVCODES |
| 172 | HLJB | HULL, JOHN B INC | | | SCAC4 |
| 173 | HLJN | HOLLINGER, J L & SONS INC | | | SCAC4 |
| 174 | HLJU | HONDURAS LOGISTICS AND SHIPPING COMPANY | | HN | BIC |
| 175 | HLJY | HARLEY, PHILIP J | | | SCAC4 |
| 176 | HLK | Heli-link Helikopter AG | Callsign: Heli-Link, Name changed to DC Aviation Switzerland AG. | CH | AVCODES |
| 177 | HLK | DC Aviation Switzerland AG | Callsign: Heli-Link, ICAO designator changed to DCH. Name changed from Heli-link Helikopter AG. | CH | AVCODES |
| 178 | HLK | Heli-Link | | | ICAO1 |
| 179 | HLKA | HELKA EXPRESS INTERNATIONAL LTD | | | SCAC4 |
| 180 | HLKC | H & L TRUCKING LLC | | | SCAC4 |
| 181 | HLKD | HILKER, DENNIS R TRUCKING INC | | | SCAC4 |
| 182 | HLKE | HLINKA ENTERPRISE INC | | | SCAC4 |
| 183 | HLKG | HEATLINK GROUP INC | | | SCAC4 |
| 184 | HLKJ | HILL TRUCKING INC | | | SCAC4 |
| 185 | HLKN | HALLS TRUCKING | | | SCAC4 |
| 186 | HLKQ | HALEAKALA TRANSPORTATION & WAREHOUS | | | SCAC4 |
| 187 | HLKS | HALL, KEITH & SONS TRANSPORT LTD | | | SCAC4 |
| 188 | HLL | Eliliguria International S.p.A. | Callsign: Eliliguria, Name changed from Eliliguria | I | AVCODES |
| 189 | HLL | Havelet Leasing Ltd. | Callsign: Havelet, | GB | AVCODES |
| 190 | HLL | Eliliguria | Callsign: Eliliguria, Name changed to Eliliguria International S.p.A. | I | AVCODES |
| 191 | HLL | Holiday Airlines Company | | T | AVCODES |
| 192 | HLL | Helicentre Liverpool Limited | Callsign: Fusion, | GB | AVCODES |
| 193 | HLLA | HOLLIS, ALVIN & COMPANY | | | SCAC4 |
| 194 | HLLB | HOLLENBECK ENTERPRISES INC | | | SCAC4 |
| 195 | HLLD | HOLLAND TESTERS LTD | | | SCAC4 |
| 196 | HLLE | HOLLAND ENTERPRISES INC | | | SCAC4 |
| 197 | HLLF | HALLS FREIGHTWAY INC | | | SCAC4 |
| 198 | HLLG | HILL LOGISTICS INC | | | SCAC4 |
| 199 | HLLH | HILL, GRAHAM | | | SCAC4 |
| 200 | HLLI | HISS LOGISTICS LLC | | | SCAC4 |
