The average train between Hatfield and Carmarthen takes 4h 52m and the fastest train takes 4h 24m. There is a train service every few hours from Hatfield to Carmarthen. 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 Hatfield and Carmarthen. The earliest departure is at 5:56 AM in the morning, and the last departure from Hatfield is at 9:56 PM which arrives into Carmarthen at 6:47 AM. All services require a transfer at London Kings Cross and take an average of 4h 52m. The schedules shown below are for the next available departures.



4h 34m • 3 changes


5h 3m • 3 changes


4h 55m • 3 changes


4h 44m • 3 changes


4h 34m • 3 changes


5h 3m • 3 changes


4h 55m • 3 changes


4h 44m • 3 changes


4h 34m • 3 changes


5h 3m • 3 changes


4h 55m • 3 changes


4h 44m • 3 changesWant to know about travelling from Hatfield to Carmarthen? 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 Hatfield to Carmarthen. However, there are services departing from Hatfield station and arriving at Carmarthen station via Swansea. The journey, including transfers, takes approximately 4h 52m.
Hatfield to Carmarthen train services, operated by Great Northern, depart from London Paddington station.
Hatfield to Carmarthen train services, operated by Great Northern, arrive at Carmarthen station.
Book your Hatfield to Carmarthen train tickets online with Great Northern, London Underground (Tube) and 2 other operators.
The distance between Hatfield and Carmarthen is 280.7 km. The road distance is 388 km.
You can take a train from Hatfield (Herts) to Carmarthen via London Kings Cross, King's Cross St. Pancras station, Paddington, London Paddington, and Swansea in around 5h 10m.