Airlines — D
- UDNDniproavia
- DOBDobrolet
- IXXDolphin Express Airlines
- DPLDome Petroleum
- MDODomenican Airlines
- MYODominguez Toledo (Grupo Mayoral)
- DOADominicana de Aviaci
- DMODomodedovo Airlines
- DVBDon Avia
- DONDonair Flying Club
- UDCDonbassAero
- DADDorado Air
- DORDornier
- DAVDornier Aviation Nigeria
- DOMDos Mundos
- HDADragonair
- DCADreamcatcher Airways
- DRKDruk Air
- DREDrummond Island Air
- RSKDSWA
- DUBDubai Airwing
- DBKDubrovnik Air
- DUKDucair
- DBJDuchess of Britany (Jersey) Limited
- DUNDun'Air
- PHDDuncan Aviation
- VVFDunyaya Bakis Hava Tasimaciligi
- DUODuo Airways
- DJEDurango Jet
- DNLDutch Antilles Express
- DCEDutch Caribbean Express
- DBRDutchbird
- DFSDwyer Aircraft Services
- XDYDynair Services
- DNRDynamair Aviation
- DYEDynamic Air
- DYADynamic Airways