Carmarthen to Watford Trains

Carmarthen to Watford trains

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Trip Overview

The average train between Carmarthen and Watford takes 4h 50m and the fastest train takes 4h 43m. The train service runs several times per day from Carmarthen to Watford. 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 50m
Duration: 236 mi
Distance: £126
Average price: Every 4 hours
Frequency

Train

best

Take the train from Carmarthen to London Paddingtontrain Carmarthen - London Paddington

4h 43m

£106–187

Carmarthen to Watford train times

Trains run every 4 hours between Carmarthen and Watford. The earliest departure is at 7:23 AM in the morning, and the last departure from Carmarthen is at 7:20 PM which arrives into Watford at 12:28 AM. All services require a transfer at London Paddington and take an average of 4h 50m. The schedules shown below are for the next available departures.

Departing Saturday, October 24, 2026

5:30 PM → 10:13 PM
4h 43m • 2 changes

Departing Sunday, October 25, 2026

11:25 AM → 4:13 PM
4h 48m • 2 changes
2:15 PM → 7:13 PM
4h 58m • 2 changes
4:30 PM → 9:13 PM
4h 43m • 2 changes
7:20 PM → 12:28 AM
Arrives next day
5h 8m • 2 changes

Departing Monday, October 26, 2026

7:23 AM → 12:13 PM
4h 50m • 2 changes
9:21 AM → 2:13 PM
4h 52m • 2 changes
11:27 AM → 4:13 PM
4h 46m • 2 changes
2:20 PM → 7:11 PM
4h 51m • 2 changes
Show more

Departing Tuesday, October 27, 2026

7:23 AM → 12:13 PM
4h 50m • 2 changes
9:21 AM → 2:13 PM
4h 52m • 2 changes
11:27 AM → 4:13 PM
4h 46m • 2 changes
2:20 PM → 7:11 PM
4h 51m • 2 changes
Show more

Departing Wednesday, October 28, 2026

7:23 AM → 12:13 PM
4h 50m • 2 changes
9:21 AM → 2:13 PM
4h 52m • 2 changes
11:27 AM → 4:13 PM
4h 46m • 2 changes
2:20 PM → 7:11 PM
4h 51m • 2 changes
Show more

Departing Thursday, October 29, 2026

7:23 AM → 12:13 PM
4h 50m • 2 changes
9:21 AM → 2:13 PM
4h 52m • 2 changes
11:27 AM → 4:13 PM
4h 46m • 2 changes
2:20 PM → 7:11 PM
4h 51m • 2 changes
Show more

Departing Friday, October 30, 2026

7:23 AM → 12:13 PM
4h 50m • 2 changes
9:21 AM → 2:13 PM
4h 52m • 2 changes
11:27 AM → 4:13 PM
4h 46m • 2 changes
2:20 PM → 7:11 PM
4h 51m • 2 changes
Show more

Frequently asked questions

Want to know about travelling from Carmarthen to Watford? 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.