The average bus between Cardiff and Southwold takes 12h 21m and the fastest bus takes 10h 10m. The bus service runs several times per day from Cardiff to Southwold. 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 3 times a day between Cardiff and Southwold. The earliest departure is at 3:25 AM at night, and the last departure from Cardiff is at 4:40 PM which arrives into Southwold at 10:00 AM. All services require a transfer at Heathrow Central Bus Station and take an average of 12h 21m. The schedules shown below are for the next available departures.


10h 25m • 2 changes


10h 25m • 2 changes


10h 30m • 2 changes
Arrives next day


17h 30m • 2 changes


10h 25m • 2 changes


10h 25m • 2 changes


10h 30m • 2 changes
Arrives next day


17h 30m • 2 changes
Want to know about travelling from Cardiff to Southwold? 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 Cardiff to Southwold. However, there are services departing from Cardiff station and arriving at Southwold station via Heathrow Central Bus Station station. The journey, including transfers, takes approximately 12h 21m.
Cardiff to Southwold bus services, operated by National Express, depart from Sophia Gardens station.
Cardiff to Southwold bus services, operated by National Express, arrive at Kings Head station.
The distance between Cardiff and Southwold is 346.3 km. The road distance is 524 km.
You can take a bus from Sophia Gardens to Kings Head via Heathrow Central Bus Station, Bus Station, and St Stephens Street in around 9h 55m.