Airlines — H
- HLGHelog
- OAWHelvetic Airways
- HMSHemus Air
- HACHenebury Aviation
- SSHHeritiage Flight (Valley Air Services)
- MRXHerman's Markair Express
- HRMHermes Airlines
- HEDHerritage Aviation Developments
- ALXHewa Bora Airways
- HERHex'Air
- HFYHi Fly
- HHSHi-Jet Helicopter Services
- HLBHigh-Line Airways
- HWYHighland Airways
- HYMHimalayan Airlines
- HISHispaniola Airways
- HGAHogan Air
- NTHHokkaido Air System
- ADOHokkaido International Airlines
- ABHHokuriki-Koukuu Company
- HOAHola Airlines
- HINHolding International Group
- HOLHoliday Airlines
- HCCHolidays Czech Airlines
- HTRHolstenair Lubeck
- HMVHomac Aviation
- OMEHomer Air
- HASHonduras Airlines
- CRKHong Kong Airlines
- HKEHong Kong Express Airways
- HEXHoniara Cargo Express
- HPJHop-A-Jet
- QXEHorizon Air
- HSMHorizon Air for Transport and Training
- KOKHorizon Air Service
- HORHorizon Air-Taxi
- HZAHorizon Airlines
- HPSHorizon Plus
- HUDHorizons Unlimited
- HOZHorizontes Aereos
- HDIHoteles Dinamicos
- HHOHouston Helicopters
- GGVHouston Jet Services
- OZUHozu-Avia
- HWDHPM Investments
- KTRHT Helikoptertransport
- AHTHTA Helicopteros
- HUBHub Airlines
- HUSHuessler Air Service
- GMHHughes Aircraft Company
- WHRHummingbird Helicopter Service
- HUVHunair Hungarian Airlines
- HUFHungarian Air Force
- HYAHyack Air
- HYCHydro Air Flight Operations
- HYDHydro-Québec