London to Carmarthen by train Find train times and tickets

  • First train
    08:37
  • Last train
    17:45
  • Avg changes
    0
  • Fastest journey
    3hr 55m

Travelling from London to Carmarthen by train

The fastest trains from London to Carmarthen take around 3 hours and 55 minutes, covering a distance of approximately 292 kilometres. There are frequent services on the rail route between London and Carmarthen.

Direct trains run between London and Carmarthen.

We usually find at least one direct train on the route from London to Carmarthen every weekday.

Trains are typically more frequent on weekends, when we found around 10 departures. The duration is normally about 3 hours and 55 minutes, whatever time you make the journey.

On weekdays the only direct train to Carmarthen is usually scheduled to depart London around 16:45. At weekends the first train of the day leaves London around 08:30, and the last at 17:45.

Route map is indicative only and may differ from the optimal route. Actual routes will be displayed when searching.

When to book London to Carmarthen train tickets?

Trains in the UK usually open for booking around 3 months in advance. If booking is not yet open for your dates then you can set a booking alert to receive an email on the day that the cheapest tickets are released for your journey from London to Carmarthen by train.

Which trains operate between London and Carmarthen?

More than one type of train operates on the route from London to Carmarthen, so you’ll be travelling with one or more of the following rail operators:

  • First Great Western
  • Great Western Railway

You can check which train you’ll be travelling on by looking for the train name in search results.

Find journey information for Carmarthen to London

Route map is indicative only and may differ from the optimal route. Actual routes will be displayed when searching.

Other journeys to Carmarthen View all journeys to Carmarthen

Search accommodation in Carmarthen

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Country guide

Trains to the UK

Read our country guide

Child and youth passengers

The definition of "Child" and "Youth" varies by country and rail operator. This is why we ask for the age of young passengers.

Sometimes children below a certain age can travel without a seat for free. If you want to guarantee a seat for child passengers, enter '6' as the age of the child.

Read more about child and youth passenger ages. See also youth discounts and railcards.

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