The average bus between Slough and Portishead takes 4h and the fastest bus takes 3h 10m. 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 10:02 PM which arrives into Portishead at 1:50 AM. All services require a transfer at Heathrow Central Bus Station and take an average of 4h. The schedules shown below are for the next available departures.


3h 53m • 2 changes

4h 5m • 2 changes

4h • 2 changes

3h 53m • 2 changes

6h 55m • 2 changes

3h 43m • 2 changes

3h 40m • 2 changes

3h 39m • 2 changes

8h 52m • 2 changes

3h 54m • 2 changes

3h 45m • 2 changes

3h 54m • 2 changes

6h 55m • 2 changes

3h 47m • 2 changes

3h 42m • 2 changes

3h 49m • 2 changesWant 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.
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 198 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 13m.