The average train between Westminster and Merthyr Tydfil takes 3h 33m and the fastest train takes 3h 14m. There is an hourly train service from Westminster 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 Westminster and Merthyr Tydfil. The earliest departure is at 6:48 AM in the morning, and the last departure from Westminster is at 10:49 PM which arrives into Merthyr Tydfil at 6:33 AM. All services require a transfer, and take on average 3h 33m. The schedules shown below are for the next available departures.

3h 15m • 1 change

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3h 55m • 1 change

3h 53m • 1 change

3h 43m • 1 change

3h 42m • 1 change
Want to know about travelling from Westminster 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 Westminster to Merthyr Tydfil. However, there are services departing from Westminster station and arriving at Merthyr Tydfil station via Cardiff Central. The journey, including transfers, takes approximately 3h 33m.
Westminster to Merthyr Tydfil train services, operated by Great Western Railway (GWR), depart from London Paddington station.
Westminster to Merthyr Tydfil train services, operated by Great Western Railway (GWR), arrive at Merthyr Tydfil station.
Book your Westminster to Merthyr Tydfil train tickets online with Great Western Railway (GWR) and Transport for Wales.
The distance between Westminster and Merthyr Tydfil is 225.5 km. The road distance is 270 km.
You can take a train from London Paddington to Merthyr Tydfil via Cardiff Central in around 3h 25m.