Waco (USA) — The Waco Aircraft Company, Troy, Ohio, USA.
- Waco Model 10 — Single-engine two-seat biplane
- Waco Model ASO — Single-engine two-seat biplane
- Waco Model ECG-8 Custom Cabin — Single-engine 5-seat cabin sesquiplane
- Waco Model INF — Single-engine two-seat biplane
- Waco Model QCF — Single-engine three-seat biplane
- Waco Model UEC — Single-engine four-seat biplane
- Waco Model UPF-7 — Single-engine two-seat biplane
- Waco Model VPF-7 — Single-engine three-seat biplane
- Waco Model ZPF-7 — Single-engine three-seat biplane
- Waco CG-4A Hadrian — WWII High-wing Troop/Cargo Assault Glider
Wainwright (USA) — Wayne Wainwright
- Wainwright Yak-11 Moose (replica) — Single-engine two-seat low-wing monoplane trainer
Wallis (USA) — Stanley B. Wallis
- Wallis Model 3 — Single-engine two-seat biplane
Western Electric (USA) — Western Electric Company
- Western Electric SAM-A-7 Nike Ajax — Two-stage surface-to-air anti-aircraft missile
Westland (UK) — Westland Aircraft Works (1915); Westland Aircraft Ltd. (1935); Westland Helicopters Ltd. (1966)
- Westland Belvedere HC1 — British Twin-engine twin-rotor helicopter
- Westland Lysander Mk.III — Single-engine two-seat high-wing monoplane
- Westland Lysander Mk.IIIa — Single-engine two-seat Army co-operation high-wing monoplane
- Westland Wallace Mk.II — British single-engine two-seat general-purpose biplane
White (USA) — White
- White New Standard D-25 — Single-engine five-seat joy-rider biplane
Williams (USA) — Williams Research; Williams International (1985)
- Williams V-Jet II — Twin-jet five-seat small business/personal aircraft
Williams (USA) — Arthur L. Williams and Carl Cangie (1971)
- Williams-Cangie WC-1 Sundancer — Single-engine midget biplane racer
Wills (USA) — Wills
- Wills Wing XC-185 — Hang glider
Willys-Overland (USA) — Willys-Overland
- Willys-Overland LTV-N-2 Loon — Pulse-jet powered cruise missile.
Wing (USA) — Wing Aircraft Company (1968)
- Wing D-1 Derringer — Twin-engine two-seat low-wing cabin monoplane
Wittman (USA) — Steve Wittman (1931)
- Wittman D-12 Bonzo — Single-engine single-seat monoplane midget racer
- Wittman DFA Little Bonzo — Single-engine single-seat mid-wing monoplane midget racer
Wolf (USA) — Donald S. Wolf
- Wolf W-11 Boredom Fighter — Single-engine single-seat homebuilt biplane
Wright (USA) — Wilbur and Orville Wright (1900); Wright & Company (1909); Wright-Martin Company (1916); Wright Aeronautical Corporation (1919)
- 1903 Wright Flyer — Single-engine twin-screw single-place pioneer biplane
- 1909 Wright Military Flyer — Single-engine twin-screw two-seat military biplane
- 1911 Wright Modified B Flyer — Single-engine twin-screw two-seat military biplane
- Wright EX Vin Fiz — Single-engine twin-prop pioneer biplane
WSK-Mielec (Poland) — Wytwórnia Sprzetu Komunikacyjnego-PZL Mielec (1948-1992)
- WSK LiM-2 (MiG-15bis) Fagot — Single-engine single-seat jet-fighter
- WSK-PZL Mielec LiM-6bis (MiG-17F) Fresco-A — Single-engine single-seat jet fighter
- WSK-PZL Mielec TS-11 Iskra — Single-engine two-seat jet trainer