Q
- Quad City, Quad City Ultralight Aircraft Corp – United States
- Quasar, Dolní Bečva, Czech Republic
- Quercy, Centre National Quercy-Rouergue RSA – France
- Quest, Quest Aircraft Company LLC – United States
- Questair, Questair Inc – United States
- Quickie, Quickie Aircraft Corporation – United States
- Quickie, Quickie Enterprises Inc – United States
- Quikkit, Quikkit Corporation – United States
- Quikkit, Quikkit Division of Rainbow Flyers Inc – United States
- Quikkit, Quikkit Inc – United States
- Qantas, Qantas Inc – Australia