The average train between Maidenhead and Carmarthen takes 4h 32m and the fastest train takes 3h 44m. There is a train service every few hours from Maidenhead 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 Maidenhead and Carmarthen. The earliest departure is at 6:45 AM in the morning, and the last departure from Maidenhead is at 11:00 PM which arrives into Carmarthen at 7:42 AM. All services require a transfer at Reading and take an average of 4h 32m. The schedules shown below are for the next available departures.
Arrives next day


5h 7m • 2 changes
Arrives next day


8h 42m • 2 changes


3h 45m • 2 changes


4h 4m • 2 changes


3h 54m • 2 changes


4h 2m • 2 changes


3h 45m • 2 changes


4h 4m • 2 changes


3h 54m • 2 changes


4h 2m • 2 changes


3h 45m • 2 changes


4h 4m • 2 changes


3h 54m • 2 changes


4h 2m • 2 changes
Want to know about travelling from Maidenhead 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 Maidenhead to Carmarthen. However, there are services departing from Maidenhead station and arriving at Carmarthen station via Cardiff Central. The journey, including transfers, takes approximately 4h 32m.
Maidenhead to Carmarthen train services, operated by Great Western Railway (GWR), depart from Reading station.
Maidenhead to Carmarthen train services, operated by Great Western Railway (GWR), arrive at Carmarthen station.
Book your Maidenhead to Carmarthen train tickets online with Great Western Railway (GWR), Transport for Wales and Elizabeth Line (TfL).
The distance between Maidenhead and Carmarthen is 249.9 km. The road distance is 317 km.
You can take a train from Maidenhead to Carmarthen via Reading and Cardiff Central in around 4h 36m.