How much does a cheap train ticket from Carmarthen to Swansea cost?

The average train ticket price from Carmarthen to Swansea is £15. The best way to find cheap train tickets from Carmarthen to Swansea is to book your tickets as early as possible. Prices tend to rise as your travel date approaches, so book in advance to secure the best prices!

How long is the train trip from Carmarthen to Swansea?

A train trip between Carmarthen and Swansea is around 49m, although the fastest train will take about 42m. This is the time it takes to travel the 23 miles that separates the two cities.

How many daily train are there between Carmarthen and Swansea?

The number of trains from Carmarthen to Swansea can differ depending on the day of the week. On average, there are 10. Some trains are direct while others include transferring trains. Simplify your train trip from Carmarthen to Swansea by comparing and selecting the train that fits your travel style and budget on Busbud.

Which train companies travel from Carmarthen to Swansea?

When taking the train from Carmarthen to Swansea, you can travel comfortably and safely with Transport for Wales, Great Western Railway.

Train Carmarthen to Swansea from £14

Next train departures

Next departures from Carmarthen to Swansea on 20 November
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	07:23	Carmarthen	50m	08:13	Swansea	Cheapest
Train	10:31	Carmarthen	45m	11:16	Swansea	Fastest
Train	07:23	Carmarthen	50m	08:13	Swansea	No tags
Train	07:59	Carmarthen	48m	08:47	Swansea	No tags
Train	08:31	Carmarthen	46m	09:17	Swansea	No tags

Last refresh of the prices: Today at 01:32 GMT.

Compare 2 ways to travel from Carmarthen to Swansea

We recommend taking the bus

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.

2bus per day

50mAverage duration

23 milesDistance

1kgCO₂ emissions

	Average price	Average duration	CO₂ emissions	Actions
Bus	Average price£8 - £10	Average duration50m	CO₂ emissions 1kg CO₂e
Train	Average price£15 - £22	Average duration49m	CO₂ emissions 1kg CO₂e

Train Companies

Transport for Wales

3.5/58 reviews

Staff5

Timeliness5

Cleanliness5

WiFi5

Great Western Railway

4/542 reviews

Staff5

Timeliness4.7

Cleanliness4.7

WiFi4

GB train companies: Amtrak, Trenitalia, Renfe, VIA Rail Canada, RegioJet, FlixTrain, CrossCountry

Frequently asked questions about travelling from Carmarthen to Swansea by train

How much does a cheap train ticket from Carmarthen to Swansea cost?
The average train ticket price from Carmarthen to Swansea is £15. The best way to find cheap train tickets from Carmarthen to Swansea is to book your tickets as early as possible. Prices tend to rise as your travel date approaches, so book in advance to secure the best prices!
How long is the train trip from Carmarthen to Swansea?
A train trip between Carmarthen and Swansea is around 49m, although the fastest train will take about 42m. This is the time it takes to travel the 23 miles that separates the two cities.
How many daily train are there between Carmarthen and Swansea?
The number of trains from Carmarthen to Swansea can differ depending on the day of the week. On average, there are 10. Some trains are direct while others include transferring trains. Simplify your train trip from Carmarthen to Swansea by comparing and selecting the train that fits your travel style and budget on Busbud.
Which train companies travel from Carmarthen to Swansea?
When taking the train from Carmarthen to Swansea, you can travel comfortably and safely with Transport for Wales, Great Western Railway.

Find cheapest prices for trains

Price is for a one-way ticket for one passenger and based on past searches.

Best price found

17/11

£14

18/11

£14

Today

£14

20/11

£14

21/11

£14

22/11

£14

23/11

£14

24/11

£14

The cheapest trip from Carmarthen to Swansea was searched and found on 21 Nov 2025 with a price of £14

To 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 £21 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 2025-11-21.