The average train between Merthyr Tydfil and London takes 3h 20m and the fastest train takes 3h. There is a train service every few hours from Merthyr Tydfil to London. 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 Merthyr Tydfil and London. The earliest departure is at 6:09 AM in the morning, and the last departure from Merthyr Tydfil is at 10:37 PM which arrives into London at 7:16 AM. All services require a transfer, and take on average 3h 20m. The schedules shown below are for the next available departures.

3h 1m • 1 change

3h • 1 change

3h 2m • 1 change
Arrives next day

8h 39m • 1 change

3h 3m • 1 change

3h 5m • 1 change

3h 5m • 1 change

3h 11m • 1 change

3h 3m • 1 change

3h 5m • 1 change

3h 5m • 1 change

3h 11m • 1 change
Want to know about travelling from Merthyr Tydfil to London? 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 Merthyr Tydfil to London. However, there are services departing from Merthyr Tydfil station and arriving at London station via Cardiff Central. The journey, including transfers, takes approximately 3h 20m.
Merthyr Tydfil to London train services, operated by Transport for Wales, depart from Merthyr Tydfil station.
Merthyr Tydfil to London train services, operated by Transport for Wales, arrive at London Paddington station.
Book your Merthyr Tydfil to London train tickets online with Transport for Wales and Great Western Railway (GWR).
The distance between Merthyr Tydfil and London is 226 km. The road distance is 270 km.
You can take a train from Merthyr Tydfil to London Paddington via Cardiff Central in around 3h 22m.