British Aircraft Companies - S
- Sage
- Sailplane Designs
- SAL
- Salmet
- Salmon
- Samad
- Sanders
- Saro
- Saul
- Saunders
- Saunders-Roe
- Saunderson
- Sayers
- Schmarz
- Scott
- Scott, B.D and W.E.
- Scott, V.
- Scott, W.R.
- Scottish Aeroplane Syndicate
- Scottish Aircraft Construction
- Scottish Aircraft and Engineering
- Scottish Aviation Co.
- Scottish Aviation
- Seaplane Experimental Station
- Searsby
- Seddon
- Segrave
- Sellars
- Sepecat
- Servotec
- Shackleton-Murray
- Shapley
- Sharpe
- Shaw
- Sheffield
- Sheffield and District
- Shenstone
- Sheriff
- Shield
- Short
- Shorter
- Siddeley
- Sigma
- Sim
- Simmonds
- Simms, F.R
- Simms, H.R
- Singh
- Sippe
- Sirie
- Sizer
- Skinner
- Skudder
- Skyleader
- Skyfly
- Slingsby
- Smeaton
- Smith (circa 1981)
- Smith, J.W.
- Smith, O.
- Smith, S.
- Smith, W.W.
- Smith and Mateyka
- Smithers
- Smyth
- Snipe
- Snowbird
- Solar-Powered Aircraft Developments
- Sonoda
- Sopwith
- Somers-Kendall
- South Essex
- South West
- Southampton University
- Southdown
- Southern
- Southern Aero Sports
- Spartan
- Speedtwin
- Spencer
- Spencer-Stirling
- Sponson
- Sprite
- Sproule-Ivanoff
- Stamps
- Star
- Stedman
- Stewart, A
- Stewart, N.S.
- Stinton-Warren
- Stocks and Cochrane
- Stoddart
- Stone
- Storey, I.H.
- Storey, T.
- Stratospheric Platforms
- Sturgess
- Summerfield
- SUMPAC
- Sunbeam
- Supermarine
- Surrey
- Sutton
- Swales
- Swann
- Swarm
- Swift
- Sykes
- Szep