Watford Junction to Cardiff Trains

Watford Junction to Cardiff trains

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Trip Overview

The average train between Watford Junction and Cardiff takes 3h 2m and the fastest train takes 2h 44m. There is an hourly train service from Watford Junction to Cardiff. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.

3h 2m
Duration: 160 mi
Distance: £87
Average price: Hourly
Frequency

Train

best

Take the train from Watford Junction to Queens Park (London)train Watford Junction - London Euston / ...
Take the train from London Paddington to Cardiff Centraltrain London Paddington - Swansea / ...

3h 9m

£74–132

Watford Junction to Cardiff train times

Trains run hourly between Watford Junction and Cardiff. The earliest departure is at 5:45 AM in the morning, and the last departure from Watford Junction is at 11:30 PM which arrives into Cardiff at 8:06 AM. All services require a transfer at Queens Park (London) and take an average of 3h 2m. The schedules shown below are for the next available departures.

Departing Monday, November 2, 2026

5:45 AM → 8:40 AM
2h 55m • 2 changes
6:15 AM → 9:08 AM
2h 53m • 2 changes
6:45 AM → 9:36 AM
2h 51m • 2 changes
7:15 AM → 10:12 AM
2h 57m • 2 changes
Show more

Departing Tuesday, November 3, 2026

5:45 AM → 8:40 AM
2h 55m • 2 changes
6:15 AM → 9:08 AM
2h 53m • 2 changes
6:45 AM → 9:36 AM
2h 51m • 2 changes
7:15 AM → 10:12 AM
2h 57m • 2 changes
Show more

Departing Wednesday, November 4, 2026

5:45 AM → 8:40 AM
2h 55m • 2 changes
6:15 AM → 9:08 AM
2h 53m • 2 changes
6:45 AM → 9:36 AM
2h 51m • 2 changes
7:15 AM → 10:12 AM
2h 57m • 2 changes
Show more

Departing Thursday, November 5, 2026

5:45 AM → 8:40 AM
2h 55m • 2 changes
6:15 AM → 9:08 AM
2h 53m • 2 changes
6:45 AM → 9:36 AM
2h 51m • 2 changes
7:15 AM → 10:12 AM
2h 57m • 2 changes
Show more

Departing Friday, November 6, 2026

5:45 AM → 8:40 AM
2h 55m • 2 changes
6:15 AM → 9:08 AM
2h 53m • 2 changes
6:45 AM → 9:36 AM
2h 51m • 2 changes
7:15 AM → 10:12 AM
2h 57m • 2 changes
Show more

Departing Saturday, November 7, 2026

5:45 AM → 8:36 AM
2h 51m • 2 changes
6:45 AM → 9:36 AM
2h 51m • 2 changes
7:45 AM → 10:40 AM
2h 55m • 2 changes
8:45 AM → 11:40 AM
2h 55m • 2 changes
Show more

Departing Sunday, November 8, 2026

7:15 AM → 10:29 AM
3h 14m • 2 changes
8:15 AM → 11:27 AM
3h 12m • 2 changes
9:45 AM → 12:34 PM
2h 49m • 2 changes
10:45 AM → 1:34 PM
2h 49m • 2 changes
Show more

Frequently asked questions

Want to know about travelling from Watford Junction to Cardiff? 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.