The average train between Carmarthen and Euston Station takes 4h 25m and the fastest train takes 3h 47m. There is a train service every few hours from Carmarthen to Euston Station. 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 Carmarthen and Euston Station. The earliest departure is at 4:37 AM at night, and the last departure from Carmarthen is at 10:41 PM which arrives into Euston Station at 7:33 AM. All services require a transfer at Swansea and take an average of 4h 25m. The schedules shown below are for the next available departures.


3h 57m • 2 changes


4h 6m • 2 changes


4h 3m • 2 changes


4h • 2 changes


3h 56m • 2 changes


3h 55m • 2 changes


4h • 2 changes


4h 14m • 2 changes


3h 56m • 2 changes


3h 55m • 2 changes


4h • 2 changes


4h 14m • 2 changes
Want to know about travelling from Carmarthen to Euston Station? 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 Carmarthen to Euston Station. However, there are services departing from Carmarthen station and arriving at Euston Station station via Swansea. The journey, including transfers, takes approximately 4h 25m.
Carmarthen to Euston Station train services, operated by Transport for Wales, depart from Carmarthen station.
Carmarthen to Euston Station train services, operated by Transport for Wales, arrive at London Paddington station.
Book your Carmarthen to Euston Station train tickets online with Transport for Wales, Great Western Railway (GWR) and London Underground (Tube).
The distance between Carmarthen and Euston Station is 289.8 km. The road distance is 360 km.
You can take a train from Carmarthen to Euston Station via Swansea, London Paddington, Paddington, and Euston Square station in around 4h 32m.