The average train between Swansea and Southwark takes 3h 14m and the fastest train takes 3h 6m. There is a train service every few hours from Swansea to Southwark. 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 Swansea and Southwark. The earliest departure is at 3:46 AM at night, and the last departure from Swansea is at 8:23 PM which arrives into Southwark at 11:37 PM. All services require a transfer at London Paddington and take an average of 3h 14m. The schedules shown below are for the next available departures.

3h 51m • 1 change

3h 9m • 1 change

3h 9m • 1 change

3h 14m • 1 change

3h 51m • 1 change

3h 9m • 1 change

3h 9m • 1 change

3h 14m • 1 change

3h 51m • 1 change

3h 9m • 1 change

3h 9m • 1 change

3h 14m • 1 change
Want to know about travelling from Swansea to Southwark? 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 Swansea to Southwark. However, there are services departing from Swansea station and arriving at Southwark station via London Paddington. The journey, including transfers, takes approximately 3h 14m.
Swansea to Southwark train services, operated by Great Western Railway (GWR), depart from Swansea station.
Swansea to Southwark train services, operated by Great Western Railway (GWR), arrive at London Paddington station.
The distance between Swansea and Southwark is 265.7 km. The road distance is 312 km.
Great Western Railway (GWR) operates a train from Swansea to London Paddington hourly. Tickets cost £85–170 and the journey takes 2h 52m.