The average bus between Slough and Portishead takes 4h 6m and the fastest bus takes 3h 24m. There is a bus service every few hours from Slough to Portishead. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Buses run hourly between Slough and Portishead. The earliest departure is at 12:02 AM at night, and the last departure from Slough is at 9:03 PM which arrives into Portishead at 12:48 AM. All services require a transfer at Heathrow Central Bus Station and take an average of 4h 6m. The schedules shown below are for the next available departures.


4h • 2 changes


3h 51m • 2 changes


3h 50m • 2 changes


3h 50m • 2 changes


9h 28m • 2 changes


4h • 2 changes


3h 51m • 2 changes


3h 50m • 2 changes


6h 58m • 2 changes


3h 53m • 2 changes


3h 47m • 2 changes


3h 55m • 2 changes


6h 58m • 2 changes


3h 53m • 2 changes


3h 47m • 2 changes


3h 55m • 2 changes
Want to know about travelling from Slough to Portishead? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct bus from Slough to Portishead. However, there are services departing from Slough station and arriving at Portishead station via Bristol Bus Station station. The journey, including transfers, takes approximately 4h 6m.
Slough to Portishead bus services, operated by First Berkshire & The Thames Valley, depart from London Heathrow Airport station.
Slough to Portishead bus services, operated by First Berkshire & The Thames Valley, arrive at Combe Road station.
The distance between Slough and Portishead is 150.5 km. The road distance is 199 km.
You can take a bus from Wellington Street Stop B to Combe Road via Heathrow Central Bus Station, London Heathrow Airport, and Bus Station in around 4h 17m.