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- Deputy Dog
- Derek Bell
- Desert Aviation
- Desiree Horton
- Desmond Casey
- Detroit Police
- Deutschen Rotorflugunion
- DHL Airways
- Diamond Aviation
- dianna
- Discovery Helicopters
- DMac Solutions
- Doctors Medical Center
- Dodson Aviation Parts
- Dominic
- Dominique Grimaud
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- Downtown Helicopters
- Dr. Vaughn
- Dragonfly Innovations
- Dubai Police
- Duke University Medical Center Life Flight
- Durham Regional Police Air Support Unit
- Dutch Aviation Society
- Dutch Country Helicopters
- Dyfed-Powys Police
- E & B Helicopters Ltd.
- E3 Helicopters
- EAA Helicopter Ltd.
- EAC Helicopters Inc.
- eAero Auctions
- Eagle Aviation (MI)