The average train between Southwark and Swansea takes 3h 20m and the fastest train takes 3h. There is a train service every few hours from Southwark to Swansea. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Trains run hourly between Southwark and Swansea. The earliest departure is at 12:25 AM at night, and the last departure from Southwark is at 10:27 PM which arrives into Swansea at 2:11 AM. All services require a transfer at Paddington station and take an average of 3h 20m. The schedules shown below are for the next available departures.

3h 14m • 1 change
Arrives next day

3h 17m • 1 change
Arrives next day

3h 44m • 1 change

8h 37m • 1 change

3h 12m • 1 change

3h 3m • 1 change

3h 4m • 1 change

8h 37m • 1 change

3h 12m • 1 change

3h 3m • 1 change

3h 4m • 1 change
Want to know about travelling from Southwark to Swansea? 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 train from Southwark to Swansea. However, there are services departing from Southwark station and arriving at Swansea station via Swansea. The journey, including transfers, takes approximately 3h 20m.
Southwark to Swansea train services, operated by London Underground (Tube), depart from London Paddington station.
Southwark to Swansea train services, operated by London Underground (Tube), arrive at Swansea station.
The distance between Southwark and Swansea is 265.7 km. The road distance is 312 km.
Great Western Railway (GWR) operates a train from London Paddington to Swansea hourly. Tickets cost £85–170 and the journey takes 2h 53m.