How much is the train ticket from Carmarthen to Cardiff?

The cheapest train tickets from Carmarthen to Cardiff start from $12. The average price for this train route is around $20. Busbud recommends that you book your tickets in advance for a better chance to get the lowest possible price.

How long is the train journey from Carmarthen to Cardiff?

The average train ride duration from Carmarthen to Cardiff is 1h 55m, covering a distance of 55 miles (89 km). The quickest train can get you there in 1h 38m and is operated by Transport for Wales .

Which train operators service the Carmarthen to Cardiff route?

Several major train operators operate on this route with 9 trains available per day, including services from Transport for Wales , Great Western Railway .

What is the earliest and latest departure time for the train from Carmarthen to Cardiff?

The earliest train departs from Carmarthen to Cardiff at 7:18am. And the latest train departs at 10:43pm.

What is the best train operator from Carmarthen to Cardiff?

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 Cardiff?

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 most timely service from Carmarthen to Cardiff?

According to Busbud traveller reviews, the most timely 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 Cardiff?

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.

Train Carmarthen to Cardiff from $12

Next train departures

Next departures for Carmarthen to Cardiff on January 26
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	3:56pm	Carmarthen	2h 56m	6:52pm	Cardiff Central	Cheapest
Train	3:56pm	Carmarthen	2h 56m	6:52pm	Cardiff Central	Fastest
Train	4:57pm	Carmarthen	3h 1m	7:58pm	Cardiff Central	No tags
Train	4:57pm	Carmarthen	3h 1m	7:58pm	Cardiff Central	No tags
Train	5:50pm	Carmarthen	3h 4m	8:54pm	Cardiff Central	No tags

Next departures for Carmarthen to Cardiff on January 27
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	7:57am	Carmarthen	2h 57m	10:54am	Cardiff Central	Cheapest
Train	11:00am	Carmarthen	2h 51m	1:51pm	Cardiff Central	Fastest
Train	7:57am	Carmarthen	2h 57m	10:54am	Cardiff Central	No tags
Train	8:57am	Carmarthen	2h 53m	11:50am	Cardiff Central	No tags
Train	8:57am	Carmarthen	2h 53m	11:50am	Cardiff Central	No tags

Next departures for Carmarthen to Cardiff on January 28
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	7:57am	Carmarthen	2h 57m	10:54am	Cardiff Central	Cheapest
Train	11:00am	Carmarthen	2h 51m	1:51pm	Cardiff Central	Fastest
Train	7:57am	Carmarthen	2h 57m	10:54am	Cardiff Central	No tags
Train	8:57am	Carmarthen	2h 53m	11:50am	Cardiff Central	No tags
Train	8:57am	Carmarthen	2h 53m	11:50am	Cardiff Central	No tags

Next departures for Carmarthen to Cardiff on January 29
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	7:57am	Carmarthen	2h 57m	10:54am	Cardiff Central	Cheapest
Train	11:00am	Carmarthen	2h 51m	1:51pm	Cardiff Central	Fastest
Train	7:57am	Carmarthen	2h 57m	10:54am	Cardiff Central	No tags
Train	8:57am	Carmarthen	2h 53m	11:50am	Cardiff Central	No tags
Train	8:57am	Carmarthen	2h 53m	11:50am	Cardiff Central	No tags

Next departures for Carmarthen to Cardiff on January 30
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	7:57am	Carmarthen	2h 57m	10:54am	Cardiff Central	Cheapest
Train	11:00am	Carmarthen	2h 51m	1:51pm	Cardiff Central	Fastest
Train	7:57am	Carmarthen	2h 57m	10:54am	Cardiff Central	No tags
Train	8:57am	Carmarthen	2h 53m	11:50am	Cardiff Central	No tags
Train	8:57am	Carmarthen	2h 53m	11:50am	Cardiff Central	No tags

Next departures for Carmarthen to Cardiff on January 31
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	7:24am	Carmarthen	2h 41m	10:05am	Cardiff Central	Cheapest
Train	5:30pm	Carmarthen	2h 30m	8:00pm	Cardiff Central	Fastest
Train	7:24am	Carmarthen	2h 41m	10:05am	Cardiff Central	No tags
Train	7:58am	Carmarthen	3h 3m	11:01am	Cardiff Central	No tags
Train	7:58am	Carmarthen	3h 3m	11:01am	Cardiff Central	No tags

Last refresh of the prices: Yesterday at 6:45 PM GMT.

Compare 3 ways to go from Carmarthen to Cardiff

We recommend carpooling

Among the sustainable travel choices, the Carpool stands out as the good way to reach Cardiff. The journey takes about 1 hour 50 minutes and with fares starting at just $16, it presents an excellent value for a comfortable ride.

1carpool per day

1h 50mAverage Duration

55 milesDistance

4kgCO₂ emissions

	Average Price	Average Duration	CO₂ emissions
Bus	Average Price$11 - $22	Average Duration2h 30m	CO₂ emissions 2kg CO₂e
Train	Average Price$12 - $64	Average Duration1h 55m	CO₂ emissions 2kg CO₂e
Carpool	Average Price$16 - $16	Average Duration1h 50m	CO₂ emissions 4kg 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, Amtrak Acela, FlixTrain

Frequently asked questions about traveling from Carmarthen to Cardiff 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 Carmarthen to Cardiff?
The cheapest train tickets from Carmarthen to Cardiff start from $12. The average price for this train route is around $20. Busbud recommends that you book your tickets in advance for a better chance to get the lowest possible price.
How long is the train journey from Carmarthen to Cardiff?
The average train ride duration from Carmarthen to Cardiff is 1h 55m, covering a distance of 55 miles (89 km). The quickest train can get you there in 1h 38m and is operated by Transport for Wales.
Which train operators service the Carmarthen to Cardiff route?
Several major train operators operate on this route with 9 trains available per day, including services from Transport for Wales, Great Western Railway.
What is the earliest and latest departure time for the train from Carmarthen to Cardiff?
The earliest train departs from Carmarthen to Cardiff at 7:18am. And the latest train departs at 10:43pm.
What is the best train operator from Carmarthen to Cardiff?
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 Cardiff?
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 most timely service from Carmarthen to Cardiff?
According to Busbud traveller reviews, the most timely 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 Cardiff?
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.

Best price found

01/24

$19

01/25

$12

Today

$38

01/27

$38

01/28

$38

01/29

$38

01/30

$39

01/31

$38

The cheapest trip from Carmarthen to Cardiff was searched and found on Jan 25, 2026 with a price of $12

To save money and be sure you have the best seat, it's a good idea to buy your train tickets from Carmarthen to Cardiff, as early as possible.

You can expect to pay from $12 to $61 for a train ticket from Carmarthen to Cardiff based on the last 2 days. You can expect to find the cheapest price for the trip at $38 which is on 2026-01-28.