British Aircraft Companies - A
- A4
- Abbott
- Abbott-Baynes
- ABC
- Acro
- AD
- ADC
- Addyman
- Admiralty
- AEL
- Aeolus
- Aeralis
- Aerial Manufacturing
- Aerial Targets
- Aerial Wheel
- Aero-8
- Aero and Engineering Services
- Aero Research
- Aerobotics
- AeroElvira
- Aerogypt
- Aeronautical Corporation Of Great Britain
- Aeronautical Syndicate
- Aeronca
- Aeronco
- Aeroplane Building and Flying Society
- Aerotec
- Aero-Tech
- AES
- AESIR
- AGI
- Air Navigation and Engineering Company
- Air-Plane
- Air Service Training
- Airco (circa 1912)
- Airco (circa 1958)
- Aircopta
- Aircraft Designs
- Aircraft Disposal Company
- Aircraft Manufacturing Company
- Aircraft Investment
- Airdisco
- Airglow
- Airmaster
- Airspeed
- Airtech
- Aladdin
- Alcock
- Aldershot
- Alderson
- Aldritt
- Alexander Brothers
- Allen
- Alliance
- Alula
- Alvarez
- AMF
- Amoore
- Anderson
- Anderson and Singer
- A.N.E.C
- Angus
- ARC
- ARIII
- Arkle
- Armstrong
- Armstrong Whitworth
- Army Aircraft Factory
- Arpin
- Arrow
- Arundel
- ARV
- Asboth
- Ashfield
- ASL
- AST
- Astley
- Aston Martin
- ASVEC
- ATL
- Auster
- Austin
- Austin-Ball
- Autonomous Flight
- Autonomous Vehicles International
- Avcen
- AVI
- Aviation Composites
- Aviation Enterprises
- Aviation Scotland
- Aviation Traders
- Avro
- Avro Whitworth
- A.V. Roe