Southampton to Carmarthen Trains

Southampton to Carmarthen trains

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Trip Overview

The average train between Southampton and Carmarthen takes 5h 28m and the fastest train takes 4h 36m. There is a train service every few hours from Southampton 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.

5h 28m
Duration: 191 mi
Distance: £97
Average price: Every 2 hours
Frequency

Train

best

Take the train from Southampton Central to Cardiff Centraltrain Portsmouth Harbour - Cardiff Central / ...
Take the train from Cardiff Central to Carmarthentrain Bristol Temple Meads - Milford Haven / ...

4h 47m

£73–146

Southampton to Carmarthen train times

Trains run every 2 hours between Southampton and Carmarthen. The earliest departure is at 6:47 AM in the morning, and the last departure from Southampton is at 9:12 PM which arrives into Carmarthen at 11:52 AM. All services require a transfer, and take on average 5h 28m. The schedules shown below are for the next available departures.

Departing Thursday, October 29, 2026

6:11 PM → 10:55 PM
4h 43m • 1 change
7:11 PM → 12:05 AM
Arrives next day
4h 53m • 1 change
8:11 PM → 1:03 AM
Arrives next day
4h 51m • 1 change
9:11 PM → 7:42 AM
Arrives next day
10h 31m • 1 change

Departing Friday, October 30, 2026

6:47 AM → 11:45 AM
4h 57m • 1 change
8:10 AM → 1:26 PM
5h 16m • 1 change
9:11 AM → 2:30 PM
5h 19m • 1 change
10:11 AM → 2:48 PM
4h 36m • 1 change
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Departing Saturday, October 31, 2026

6:59 AM → 11:49 AM
4h 50m • 1 change
9:10 AM → 1:48 PM
4h 38m • 1 change
11:10 AM → 3:46 PM
4h 36m • 1 change
1:10 PM → 5:51 PM
4h 41m • 1 change
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Departing Sunday, November 1, 2026

9:57 AM → 3:20 PM
5h 23m • 1 change
10:57 AM → 3:57 PM
5h • 1 change
11:57 AM → 5:25 PM
5h 28m • 1 change
12:57 PM → 5:52 PM
4h 55m • 1 change
Show more

Departing Monday, November 2, 2026

6:47 AM → 11:45 AM
4h 57m • 1 change
8:10 AM → 1:26 PM
5h 16m • 1 change
9:11 AM → 2:30 PM
5h 19m • 1 change
10:11 AM → 2:48 PM
4h 36m • 1 change
Show more

Departing Tuesday, November 3, 2026

6:47 AM → 11:45 AM
4h 57m • 1 change
8:10 AM → 1:26 PM
5h 16m • 1 change
9:11 AM → 2:30 PM
5h 19m • 1 change
10:11 AM → 2:48 PM
4h 36m • 1 change
Show more

Departing Wednesday, November 4, 2026

6:47 AM → 11:45 AM
4h 57m • 1 change
8:10 AM → 1:26 PM
5h 16m • 1 change
9:11 AM → 2:30 PM
5h 19m • 1 change
10:11 AM → 2:48 PM
4h 36m • 1 change
Show more

Frequently asked questions

Want to know about travelling from Southampton 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.