The average train between Southampton and Merthyr Tydfil takes 4h 20m and the fastest train takes 3h 51m. There is a train service every few hours from Southampton to Merthyr Tydfil. 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 Southampton and Merthyr Tydfil. The earliest departure is at 6:47 AM in the morning, and the last departure from Southampton is at 9:12 PM which arrives into Merthyr Tydfil at 9:28 AM. All services require a transfer, and take on average 4h 20m. The schedules shown below are for the next available departures.

4h 15m • 1 change

3h 53m • 1 change

3h 52m • 1 change

3h 51m • 1 change

4h 15m • 1 change

3h 53m • 1 change

3h 52m • 1 change

3h 51m • 1 change

4h 4m • 1 change

3h 53m • 1 change

3h 53m • 1 change

3h 52m • 1 change

4h 31m • 1 change

4h 31m • 1 change

4h 31m • 1 change

4h 31m • 1 change
Want to know about travelling from Southampton to Merthyr Tydfil? 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 Southampton to Merthyr Tydfil. However, there are services departing from Southampton station and arriving at Merthyr Tydfil station via Cardiff Central. The journey, including transfers, takes approximately 4h 20m.
Southampton to Merthyr Tydfil train services, operated by Great Western Railway (GWR), depart from Southampton Central station.
Southampton to Merthyr Tydfil train services, operated by Great Western Railway (GWR), arrive at Merthyr Tydfil station.
Book your Southampton to Merthyr Tydfil train tickets online with Great Western Railway (GWR) and Transport for Wales.
The distance between Southampton and Merthyr Tydfil is 166.2 km. The road distance is 223 km.
You can take a train from Southampton Central to Merthyr Tydfil via Cardiff Central in around 4h 3m.