The average bus between Merthyr Tydfil and Carmarthen takes 4h 36m and the fastest bus takes 3h 5m. The bus service runs several times per day from Merthyr Tydfil 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.
Buses run 5 times a day between Merthyr Tydfil and Carmarthen. The earliest departure is at 8:05 AM in the morning, and the last departure from Merthyr Tydfil is at 11:19 PM which arrives into Carmarthen at 10:11 AM. All services require a transfer at Bulwark and take an average of 4h 36m. The schedules shown below are for the next available departures.


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Want to know about travelling from Merthyr Tydfil 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 bus from Merthyr Tydfil to Carmarthen. However, there are services departing from Merthyr Tydfil station and arriving at Carmarthen station via Bulwark. The journey, including transfers, takes approximately 4h 36m.
Merthyr Tydfil to Carmarthen bus services, operated by Celtic Travel, depart from RAFA Club station.
Merthyr Tydfil to Carmarthen bus services, operated by Celtic Travel, arrive at Council Offices station.
The distance between Merthyr Tydfil and Carmarthen is 64.9 km. The road distance is 119 km.
You can take a bus from RAFA Club to Council Offices via Bulwark, Free Street, and Llandovery Car Park in around 4h 29m.