Carmarthen to Southampton Trains

Carmarthen to Southampton trains

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Trip Overview

The average train between Carmarthen and Southampton takes 6h and the fastest train takes 4h 56m. The train service runs several times per day from Carmarthen to Southampton. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.

6h
Duration: 191 mi
Distance: £94
Average price: Every 4 hours
Frequency

Train

best

Take the train from Carmarthen to Bristol Temple Meadstrain Fishguard Harbour - Bristol Temple Meads / ...
Take the train from Bristol Temple Meads to Southampton Centraltrain Cardiff Central - Portsmouth Harbour / ...

4h 59m

£81–142

Carmarthen to Southampton train times

Trains run every 4 hours between Carmarthen and Southampton. The earliest departure is at 5:27 AM in the morning, and the last departure from Carmarthen is at 6:57 PM which arrives into Southampton at 6:47 AM. All services require a transfer, and take on average 6h. The schedules shown below are for the next available departures.

Departing Saturday, August 15, 2026

5:27 AM → 11:02 AM
5h 35m • 1 change
6:54 AM → 12:03 PM
5h 9m • 1 change
8:56 AM → 2:02 PM
5h 6m • 1 change
11:06 AM → 4:02 PM
4h 56m • 1 change
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Departing Monday, August 17, 2026

5:32 AM → 11:02 AM
5h 30m • 1 change
6:52 AM → 12:02 PM
5h 10m • 1 change
8:49 AM → 2:04 PM
5h 14m • 1 change
10:57 AM → 4:02 PM
5h 5m • 1 change
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Departing Tuesday, August 18, 2026

5:32 AM → 11:02 AM
5h 30m • 1 change
6:52 AM → 12:02 PM
5h 10m • 1 change
8:49 AM → 2:04 PM
5h 14m • 1 change
10:57 AM → 4:02 PM
5h 5m • 1 change
Show more

Departing Wednesday, August 19, 2026

5:32 AM → 11:02 AM
5h 30m • 1 change
6:52 AM → 12:02 PM
5h 10m • 1 change
8:49 AM → 2:04 PM
5h 14m • 1 change
10:57 AM → 4:02 PM
5h 5m • 1 change
Show more

Departing Thursday, August 20, 2026

5:32 AM → 11:02 AM
5h 30m • 1 change
6:52 AM → 12:02 PM
5h 10m • 1 change
8:49 AM → 2:04 PM
5h 14m • 1 change
10:57 AM → 4:02 PM
5h 5m • 1 change
Show more

Departing Friday, August 21, 2026

5:32 AM → 11:02 AM
5h 30m • 1 change
6:52 AM → 12:02 PM
5h 10m • 1 change
8:49 AM → 2:04 PM
5h 14m • 1 change
10:57 AM → 4:02 PM
5h 5m • 1 change
Show more

Frequently asked questions

Want to know about travelling from Carmarthen to Southampton? 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.