The average train between Brentwood and Carmarthen takes 4h 55m and the fastest train takes 4h 29m. There is a train service every few hours from Brentwood 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 Brentwood and Carmarthen. The earliest departure is at 5:52 AM in the morning, and the last departure from Brentwood is at 9:52 PM which arrives into Carmarthen at 6:47 AM. All services require a transfer at London Paddington and take an average of 4h 55m. The schedules shown below are for the next available departures.


4h 41m • 2 changes


4h 36m • 2 changes


4h 42m • 2 changes


4h 49m • 2 changes


5h 2m • 2 changes


4h 46m • 2 changes


5h 26m • 2 changes


4h 50m • 2 changes


4h 39m • 2 changes


4h 57m • 2 changes


4h 46m • 2 changes


4h 38m • 2 changes


4h 39m • 2 changes


4h 57m • 2 changes


4h 46m • 2 changes


4h 38m • 2 changes
Want to know about travelling from Brentwood 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 Brentwood to Carmarthen. However, there are services departing from Brentwood station and arriving at Carmarthen station via Swansea. The journey, including transfers, takes approximately 4h 55m.
Brentwood to Carmarthen train services, operated by Elizabeth Line (TfL), depart from London Paddington station.
Brentwood to Carmarthen train services, operated by Elizabeth Line (TfL), arrive at Carmarthen station.
Book your Brentwood to Carmarthen train tickets online with Elizabeth Line (TfL), Great Western Railway (GWR) and Transport for Wales.
The distance between Brentwood and Carmarthen is 318.5 km. The road distance is 392 km.
You can take a train from Brentwood to Carmarthen via London Paddington and Swansea in around 5h 27m.