- UM Airlines
- Uni Air
- United Eagle Airlines
- United Express
- Ural Airlines
- US Airways Express
- Utair Aviation
- Vancouver Island Air
- Vieques Air Link
- Vildanen
- VIM Airlines
- VIP Ecuador
- Vladivostok Air
- VLM Airlines
- Volga-Dnepr Airlines
- Wasaya Airways
- Webjet
- Welcome Air
- West Coast Air
- West Jet Airlines
- West Wind Aviation
- Westair Benin
- Western Air
- Wideroe
- Wilderness Air
- Windjet
- Windward Islands Airways
- Wings of Alaska
- Xiamen Airlines
- XL Airways France
- Yeti Airlines
- Yangon Airways
