Next train departures
| Operated by | Vehicle type | Departure time | Departure location | Trip duration | Arrival time | Arrival location | Recommended | Price and booking link |
|---|---|---|---|---|---|---|---|---|
 | Train | Carmarthen | Swansea | Cheapest | ||||
 | Train | Carmarthen | Swansea | Fastest | ||||
| Train | Carmarthen | Swansea | No tags | ||||
| Train | Carmarthen | Swansea | No tags | ||||
| Train | Carmarthen | Swansea | No tags |
Last refresh of the prices: Yesterday at 21:00 GMT.
Compare 2 ways to travel from Carmarthen to Swansea
Among the sustainable travel choices, the bus stands out as a good way to reach Swansea. The journey takes about 50 minutes and with fares starting at just £8, it presents an excellent value for a comfortable ride.
Train Companies
Frequently asked questions about travelling from Carmarthen to Swansea by train
Please note that timetables, routes, or operator details shown here may be updated or vary at the time of your journey.
How much does a train ticket cost from Carmarthen to Swansea?
The cheapest train tickets from Carmarthen to Swansea start from £14. The average price for this train route is around £14. Busbud recommends booking your tickets in advance for the best chance of getting the lowest possible price.
How long is the train journey from Carmarthen to Swansea?
The average train journey time from Carmarthen to Swansea is 49m, covering a distance of 23 miles. The fastest train gets you there in 42m and is operated by Transport for Wales.
Which train operators serve the Carmarthen to Swansea route?
Several major train operators run on this route with 11 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 Carmarthen to Swansea?
The earliest train from Carmarthen to Swansea departs at 07:18. And the latest train departs at 23:14.
Which is the best train operator from Carmarthen to Swansea?
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 Carmarthen to Swansea?
According to reviews on Busbud, the train operator Transport for Wales has the highest Wi-Fi rating with a score of 5.0.
Which train operator has the most punctual service from Carmarthen to Swansea?
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 Carmarthen to Swansea?
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 Carmarthen to Swansea was searched and found on 13 Dec 2025 with a price of £14To save money and be sure you have the best seat, it's a good idea to buy your train tickets from Carmarthen to Swansea as early as possible.
You can expect to pay from £14 to £20 for a train ticket from Carmarthen to Swansea based on the last 2 days. You can expect to find the cheapest price for the trip at £14, which is on 2025-12-13.
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.
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