Harpenden to Carmarthen Trains

Harpenden to Carmarthen trains

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Trip Overview

The average train between Harpenden and Carmarthen takes 4h 58m and the fastest train takes 4h 28m. There is a train service every few hours from Harpenden 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.

4h 58m
Duration: 250 mi
Distance: £130
Average price: Hourly
Frequency

Train via Swansea

best

Take the train from Harpenden to Farringdontrain
Take the train from London Paddington to Swanseatrain
Take the train from Swansea to Carmarthentrain

5h 15m

£107–198

Harpenden to Carmarthen train times

Trains run hourly between Harpenden and Carmarthen. The earliest departure is at 5:52 AM in the morning, and the last departure from Harpenden is at 9:52 PM which arrives into Carmarthen at 6:47 AM. All services require a transfer at Farringdon and take an average of 4h 58m. The schedules shown below are for the next available departures.

Departing Sunday, October 25, 2026

12:52 PM → 5:25 PM
4h 33m • 3 changes
2:52 PM → 7:32 PM
4h 40m • 3 changes
4:52 PM → 9:49 PM
4h 57m • 3 changes
6:52 PM → 11:40 PM
4h 48m • 3 changes
Show more

Departing Monday, October 26, 2026

5:52 AM → 10:30 AM
4h 38m • 3 changes
6:58 AM → 11:45 AM
4h 47m • 3 changes
7:58 AM → 12:36 PM
4h 38m • 3 changes
8:52 AM → 1:26 PM
4h 34m • 3 changes
Show more

Departing Tuesday, October 27, 2026

5:52 AM → 10:30 AM
4h 38m • 3 changes
6:58 AM → 11:45 AM
4h 47m • 3 changes
7:58 AM → 12:36 PM
4h 38m • 3 changes
8:52 AM → 1:26 PM
4h 34m • 3 changes
Show more

Departing Wednesday, October 28, 2026

5:52 AM → 10:30 AM
4h 38m • 3 changes
6:58 AM → 11:45 AM
4h 47m • 3 changes
7:58 AM → 12:36 PM
4h 38m • 3 changes
8:52 AM → 1:26 PM
4h 34m • 3 changes
Show more

Departing Thursday, October 29, 2026

5:52 AM → 10:30 AM
4h 38m • 3 changes
6:58 AM → 11:45 AM
4h 47m • 3 changes
7:58 AM → 12:36 PM
4h 38m • 3 changes
8:52 AM → 1:26 PM
4h 34m • 3 changes
Show more

Departing Friday, October 30, 2026

5:52 AM → 10:30 AM
4h 38m • 3 changes
6:58 AM → 11:45 AM
4h 47m • 3 changes
7:58 AM → 12:36 PM
4h 38m • 3 changes
8:52 AM → 1:26 PM
4h 34m • 3 changes
Show more

Departing Saturday, October 31, 2026

5:52 AM → 10:25 AM
4h 33m • 3 changes
6:52 AM → 11:49 AM
4h 57m • 3 changes
7:52 AM → 12:27 PM
4h 35m • 3 changes
8:52 AM → 1:48 PM
4h 56m • 3 changes
Show more

Frequently asked questions

Want to know about travelling from Harpenden 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.