X3 and X4 services link Portishead to Bristol.
- X3 operates via Redcliff Bay, West Hill, Portishead Marina (including Sainsbury’s), Sheepway, Gordano Services and Abbots Leigh.
- X4 operates via Redcliff Bay, West Hill, Portishead High Street, Sheepway, Gordano Services, Easton-in-Gordano, Pill and Abbots Leigh.
The X3/X4 services run approximately every 15 minutes to Bristol Monday to Saturday and every 30 minutes on Sundays and Bank Holidays. Double decker buses operate on both services.