S
- Safeguard Coaches
- Salelink
- Samuel Ledgard
- Sanders Services
- Sargeants of Kington
- Scottish Bus Group
- Scottish Citylink
- Scottish Motor Traction
- Selkent
- Shamrock Buses
- Sheffield Community Transport
- Silcox Coaches
- Soames Coaches
- Solent Blue Line
- Southampton Citybus
- South Gloucestershire Bus & Coach
- South Lancs Travel
- South Notts Bus Company
- South West Coaches
- South Yorkshire Transport
- Southdown Motor Services
- Southdown PSV
- Southern National
- Southern Transit
- Southern Vectis
- Sovereign Bus & Coach
- Speedwellbus
- Stagecoach Cambridgeshire
- Stagecoach East Midlands
- Stagecoach East Scotland
- Stagecoach Express
- Stagecoach Goldline
- Stagecoach Grimsby-Cleethorpes
- Stagecoach in Bedford
- Stagecoach in Cambridge
- Stagecoach in Cheltenham
- Stagecoach in Chesterfield
- Stagecoach in Eastbourne
- Stagecoach in Devon
- Stagecoach in Hampshire
- Stagecoach in Hants & Surrey
- Stagecoach in Hastings
- Stagecoach in Hull
- Stagecoach in Lincolnshire
- Stagecoach in Mansfield
- Stagecoach in Newcastle
- Stagecoach in Peterborough
- Stagecoach in Portsmouth
- Stagecoach in Preston
- Stagecoach in South Wales
- Stagecoach in Swindon
- Stagecoach in The Fens
- Stagecoach in the South Downs
- Stagecoach in Warwickshire
- Stagecoach London
- Stagecoach Manchester
- Stagecoach Merseyside
- Stagecoach Midland Red
- Stagecoach North East
- Stagecoach North West
- Stagecoach Oxfordshire
- Stagecoach Sheffield
- Stagecoach South
- Stagecoach South East
- Stagecoach Strathtay
- Stagecoach West
- Stagecoach West Scotland
- Stagecoach Yorkshire
- Stansted Aircoach
- Stansted Transit
- Stephensons of Easingwold
- Stephensons of Essex
- Stotts Coaches
- Stotts Tours (Oldham)
- Strawberry
- Sullivan Buses
- Sunray Travel
- SupertramLink
- The Sussex Bus
- Swansea Metro
Read more about this topic: List Of Bus Operators Of The United Kingdom