The average train between Caerphilly and Carmarthen takes 2h 24m and the fastest train takes 2h 3m. There is a train service every few hours from Caerphilly 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 Caerphilly and Carmarthen. The earliest departure is at 6:03 AM in the morning, and the last departure from Caerphilly is at 10:27 PM which arrives into Carmarthen at 1:38 AM. All services require a transfer, and take on average 2h 24m. The schedules shown below are for the next available departures.

2h 17m • 1 change

2h 9m • 1 change

2h 31m • 1 change

2h 37m • 1 change

2h 22m • 1 change

2h 9m • 1 change

2h 13m • 1 change

2h 21m • 1 change

2h 22m • 1 change

2h 9m • 1 change

2h 13m • 1 change

2h 21m • 1 change
Want to know about travelling from Caerphilly 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 Caerphilly to Carmarthen. However, there are services departing from Caerphilly station and arriving at Carmarthen station via Carmarthen. The journey, including transfers, takes approximately 2h 24m.
Caerphilly to Carmarthen train services, operated by Transport for Wales, depart from Cardiff Central station.
Caerphilly to Carmarthen train services, operated by Transport for Wales, arrive at Carmarthen station.
Book your Caerphilly to Carmarthen train tickets online with Transport for Wales and Great Western Railway (GWR).
The distance between Caerphilly and Carmarthen is 81.2 km. The road distance is 136 km.
Transport for Wales operates a train from Cardiff Central to Carmarthen hourly. Tickets cost £30–55 and the journey takes 1h 45m. Great Western Railway (GWR) also services this route every 4 hours.