The average train between Carmarthen and Holyhead takes 8h 3m and the fastest train takes 7h 21m. The train service runs several times per day from Carmarthen to Holyhead. 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 every 4 hours between Carmarthen and Holyhead. The earliest departure is at 4:46 AM at night, and the last departure from Carmarthen is at 4:04 PM which arrives into Holyhead at 12:57 AM. All services require a transfer, and take on average 8h 3m. The schedules shown below are for the next available departures.

7h 30m • 1 change

8h 6m • 1 change

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8h 11m • 1 change

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8h 23m • 1 change
Want to know about travelling from Carmarthen to Holyhead? 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 Holyhead. However, there are services departing from Carmarthen station and arriving at Holyhead station via Shrewsbury. The journey, including transfers, takes approximately 8h 3m.
Carmarthen to Holyhead train services, operated by Transport for Wales, depart from Carmarthen station.
Carmarthen to Holyhead train services, operated by Transport for Wales, arrive at Holyhead station.
Book your Carmarthen to Holyhead train tickets online with Transport for Wales.
The distance between Carmarthen and Holyhead is 163.3 km. The road distance is 497 km.
You can take a train from Carmarthen to Holyhead via Shrewsbury in around 7h 37m.