| Airline Name | ICAO | IATA | Callsign | Country |
| Hahn Air | HHN | HR | Germany | |
| Hainan Airlines | CHH | HU | China | |
| Haiti Air | Haiti | |||
| Haiti Caribbean Airlines | Haiti | |||
| Halcyon Air | HCV | Cape Verde | ||
| Halcyon Air/Bissau Airways | HCN | Guinea-Bissau | ||
| Halisa Airlines | Haiti | |||
| Hamburg Airlines | HAS | HX | Germany | |
| Hamburg Chile Airlines | HBG | Chile | ||
| Hamburg International | HHI | 4R | HAMBURG JET | Germany |
| Hamra Air | HMM | HAMRA | United Arab Emirates | |
| Hansung Airlines | HAN | HANSUNG AIR | Korea, Republic Of | |
| Hapag-Lloyd | HLF | HF | HAPAG LLOYD | Germany |
| Hapag-Lloyd Express | HLX | X3 | YELLOW CAB | Germany |
| Hapagfly | HLF | HF | HAPAG LLOYD | Germany |
| Harlequin Air | HLQ | JH | Japan | |
| Harmony Airways | HMY | HQ | Canada | |
| Haughey Air Ltd. | United Kingdom | |||
| Hawaiian Airlines | HAL | HA | United States | |
| Hawkair Aviation Services | BHA | BH | HAWK | Canada |
| Hayes Productions LLC | United States | |||
| Heavylift Cargo Airlines | HLA | NP | HEAVYLIFT | United Kingdom |
| HeavyLift International Airlines | HVL | HEAVYLIFT INTERNATIONAL | United Arab Emirates | |
| Heliopolis Airline | HEP | Egypt | ||
| Helios Airways | HCY | ZU | HELIOS | Cyprus |
| Hellas Jet | HEJ | T4 | Greece | |
| Hellenic Air Force | HAF | Greece | ||
| Hellenic Imperial Airways | IMP | Greece | ||
| Hello | FHE | Switzerland | ||
| Helvetic | OAW | 2L | Switzerland | |
| Hemus Air | HMS | DU | Bulgaria | |
| Henson, The Piedmont Regional Airline | HNA | HENSON | United States | |
| Hermes Investment Group Inc | United States | |||
| Hewa Bora Airways | ALX | EO | Congo, The Democratic Republic Of The | |
| Hex'Air | HER | UD | France | |
| Hi Fly | HFY | 5K | SKY FLYER | Portugal |
| Highland Airways | HWY | 8H | HIWAY | United Kingdom |
| Highland Express Airways | TTN | VY | TARTAN | United Kingdom |
| Hispania Lineas Aereas | HSL | Spain | ||
| HM - Heli Malongo Airways | Angola | |||
| HMY Airways | HMY | HQ | Canada | |
| Hokkaido International Airlines - Air Do | ADO | HD | Japan | |
| Hola Airlines | HOA | H5 | HOLA | Spain |
| Hold Trade Air | Nigeria | |||
| Holiday Air | HLD | HW | Turkey | |
| Holland Aero Lines | Netherlands | |||
| Holland Exel | HXL | YZ | HOLLAND EXEL | Netherlands |
| Holmstroem Air | HJ | Sweden | ||
| Hong Kong Airlines | CRK | HX | BAUHINIA | Hong Kong |
| Hong Kong Express Airways | Hong Kong | |||
| Hooters Air | H1 | United States | ||
| Horizon Air | QXE | QX | United States | |
| Houston Jet Service | Multinational | |||
| Hozu-Avia | OZU | HOZAVI | Kazakhstan | |
| HPL Tours | Singapore | |||
| HRH Talal bin Abdul Aziz | Saudi Arabia | |||
| Hughes Aircraft Company | GMH | United States | ||
| Hughes Airwest | RW | HUGHES-AIR | United States | |
| Hunting Air Cargo Airlines | ABR | AG | United Kingdom | |
| Hydro Air | HYC | South Africa | ||
| Hydro-Quebec | APZ | Canada |