Next train departures
| Operated by | Vehicle type | Departure time | Departure location | Trip duration | Arrival time | Arrival location | Recommended | Price and booking link |
|---|---|---|---|---|---|---|---|---|
 | Train | Cardiff Central | Carmarthen | Cheapest | ||||
| Train | Cardiff Central | Carmarthen | Fastest | ||||
 | Train | Cardiff Central | Carmarthen | No tags | ||||
| Train | Cardiff Central | Carmarthen | No tags | ||||
| Train | Cardiff Central | Carmarthen | No tags |
Last refresh of the prices: Yesterday at 6:03 AM GMT.
Compare 2 ways to go from Cardiff to Carmarthen
Among the sustainable travel choices, the bus stands out as a good way to reach Carmarthen. The journey takes about 2 hours 10 minutes, and with fares starting at just $17, it presents an excellent value for a comfortable ride.
Train companies
Frequently asked questions about travelling from Cardiff to Carmarthen by train
Please note that schedules, routes, or operator details shown here may be updated or vary at the time of your trip.
How much is the train ticket from Cardiff to Carmarthen?
The cheapest train tickets from Cardiff to Carmarthen start at $16. The average price for this train route is around $17. Busbud recommends booking your tickets in advance to increase your chances of getting the lowest possible price.
How long is the train ride from Cardiff to Carmarthen?
The average train trip from Cardiff to Carmarthen takes 1h 51m and covers 89 km. The quickest train gets you there in 1h 36m and is operated by Transport for Wales.
Which train operators serve the Cardiff to Carmarthen route?
Several major train operators serve this route, with 10 trains available per day, including services from Transport for Wales, Great Western Railway.
What are the earliest and latest departure times for the train from Cardiff to Carmarthen?
The earliest train from Cardiff to Carmarthen departs at 7:21am. The latest train departs at 11:20pm.
What is the best train operator from Cardiff to Carmarthen?
According to Busbud customers, the highest-rated train operator on this route is Great Western Railway, with an average rating of 4.0 out of 5 stars based on 42 reviews.
Which train operator has the best Wi-Fi from Cardiff to Carmarthen?
Based on reviews on Busbud, the train operator Transport for Wales has the best Wi-Fi rating with a score of 5.0.
Which train operator has the best on-time performance from Cardiff to Carmarthen?
According to Busbud traveller reviews, the most punctual train operator on this route is Transport for Wales, with a punctuality rating of 5.0 out of 5 stars.
Which train operator has the cleanest trains from Cardiff to Carmarthen?
According to Busbud traveller reviews, the train operator with the cleanest trains on this route is Transport for Wales, with a cleanliness rating of 5.0 out of 5 stars.
Find cheapest prices for trains
Price is for a one-way ticket for one passenger and based on past searches.
The cheapest trip from Cardiff to Carmarthen was searched and found on Nov 30, 2025 with a price of $15To save money and be sure you have the best seat, it's a good idea to buy your train tickets from Cardiff to Carmarthen, as early as possible.
You can expect to pay from $15 to $79 for a train ticket from Cardiff to Carmarthen based on the last 2 days. You can expect to find the cheapest price for the trip at $16 which is on 2025-12-02.
Usually Great Western Railway will charge you higher prices for tickets closer to the departure date. To find the best prices, you should be flexible on your date of travel.
What's the cheapest way to go from Cardiff to Carmarthen?
The train is the cheapest travel choice for this destinationThe best way to travel between Cardiff and Carmarthen is by train. By choosing the train, you'll get to save some money as you travel to your destination, as ticket prices cost $17 on average. If you're on a budget, you'll find cheap tickets from $16. If you're looking for the fastest way to get to Carmarthen, choose the train, as it will take you from Cardiff to Carmarthen in about 1h 51m —that's the fastest way to get there!
