The average bus between Southall and Cardiff takes 4h 8m and the fastest bus takes 3h 30m. There is a bus service every few hours from Southall to Cardiff. 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 Southall and Cardiff. The earliest departure is at 6:25 AM in the morning, and the last departure from Southall is at 11:54 PM which arrives into Cardiff at 4:00 AM. All services require a transfer, and take on average 4h 8m. The schedules shown below are for the next available departures.

4h 18m • 1 change
Arrives next day

4h 2m • 1 change
Arrives next day

4h 5m • 1 change

4h 34m • 1 change

4h 21m • 1 change

3h 41m • 1 change

4h 11m • 1 change

4h 34m • 1 change

4h 21m • 1 change

3h 41m • 1 change

4h 21m • 1 change

4h • 1 change

4h 13m • 1 change

3h 43m • 1 change

4h 22m • 1 change

4h • 1 change

4h 13m • 1 change

3h 30m • 1 change

4h 20m • 1 change
Want to know about travelling from Southall to Cardiff? 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 Southall to Cardiff. However, there are services departing from Southall station and arriving at Cardiff station via Sophia Gardens. The journey, including transfers, takes approximately 4h 8m.
Southall to Cardiff bus services, operated by First Bus London, depart from Heathrow Central Bus Station.
Southall to Cardiff bus services, operated by First Bus London, arrive at Sophia Gardens station.
The distance between Southall and Cardiff is 194.5 km. The road distance is 231 km.
National Express operates a bus from Heathrow Central Bus Station to Sophia Gardens hourly. Tickets cost £26–65 and the journey takes 2h 55m.