London to Merthyr Tydfil Trains

London to Merthyr Tydfil trains

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Trip Overview

The average train between London and Merthyr Tydfil takes 3h 33m and the fastest train takes 3h 14m. There is an hourly train service from London 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.

3h 33m
Duration: 168 mi
Distance: £88
Average price: Hourly
Frequency

Train

best

Take the train from London Paddington to Cardiff Centraltrain London Paddington - Swansea / ...
Take the train from Cardiff Central to Merthyr Tydfiltrain Aberdare - Merthyr Tydfil / ...

3h 26m

£75–140

London to Merthyr Tydfil train times

Trains run hourly between London and Merthyr Tydfil. The earliest departure is at 5:23 AM in the morning, and the last departure from London 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.

Departing Monday, August 10, 2026

3:16 PM → 6:33 PM
3h 17m • 1 change
3:48 PM → 7:03 PM
3h 15m • 1 change
4:18 PM → 7:33 PM
3h 15m • 1 change
4:48 PM → 8:03 PM
3h 15m • 1 change
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Departing Tuesday, August 11, 2026

5:23 AM → 9:33 AM
4h 10m • 1 change
6:48 AM → 10:03 AM
3h 15m • 1 change
7:12 AM → 10:33 AM
3h 21m • 1 change
7:48 AM → 11:03 AM
3h 15m • 1 change
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Departing Wednesday, August 12, 2026

5:23 AM → 9:33 AM
4h 10m • 1 change
6:48 AM → 10:03 AM
3h 15m • 1 change
7:12 AM → 10:33 AM
3h 21m • 1 change
7:48 AM → 11:03 AM
3h 15m • 1 change
Show more

Frequently asked questions

Want to know about travelling from London 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.