Cardiff to Watford Junction Trains

Cardiff to Watford Junction trains

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Trip Overview

The average train between Cardiff and Watford Junction takes 2h 58m and the fastest train takes 2h 51m. There is an hourly train service from Cardiff to Watford Junction. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.

2h 58m
Duration: 160 mi
Distance: £89
Average price: Hourly
Frequency

Train

best

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

2h 53m

£75–131

Cardiff to Watford Junction train times

Trains run hourly between Cardiff and Watford Junction. The earliest departure is at 5:07 AM in the morning, and the last departure from Cardiff is at 9:20 PM which arrives into Watford Junction at 12:17 AM. All services require a transfer at London Paddington and take an average of 2h 58m. The schedules shown below are for the next available departures.

Departing Monday, November 2, 2026

5:07 AM → 8:15 AM
3h 8m • 2 changes
5:53 AM → 8:45 AM
2h 51m • 2 changes
6:24 AM → 9:17 AM
2h 53m • 2 changes
6:51 AM → 10:02 AM
3h 10m • 2 changes
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Departing Tuesday, November 3, 2026

5:07 AM → 8:15 AM
3h 8m • 2 changes
5:53 AM → 8:45 AM
2h 51m • 2 changes
6:24 AM → 9:17 AM
2h 53m • 2 changes
6:51 AM → 10:02 AM
3h 10m • 2 changes
Show more

Departing Wednesday, November 4, 2026

5:07 AM → 8:15 AM
3h 8m • 2 changes
5:53 AM → 8:45 AM
2h 51m • 2 changes
6:24 AM → 9:17 AM
2h 53m • 2 changes
6:51 AM → 10:02 AM
3h 10m • 2 changes
Show more

Departing Thursday, November 5, 2026

5:07 AM → 8:15 AM
3h 8m • 2 changes
5:53 AM → 8:45 AM
2h 51m • 2 changes
6:24 AM → 9:17 AM
2h 53m • 2 changes
6:51 AM → 10:02 AM
3h 10m • 2 changes
Show more

Departing Friday, November 6, 2026

5:07 AM → 8:15 AM
3h 8m • 2 changes
5:53 AM → 8:45 AM
2h 51m • 2 changes
6:24 AM → 9:17 AM
2h 53m • 2 changes
6:51 AM → 10:02 AM
3h 10m • 2 changes
Show more

Departing Saturday, November 7, 2026

5:14 AM → 8:18 AM
3h 4m • 2 changes
6:20 AM → 9:18 AM
2h 58m • 2 changes
6:48 AM → 9:47 AM
2h 59m • 2 changes
7:18 AM → 10:18 AM
3h • 2 changes
Show more

Departing Sunday, November 8, 2026

8:50 AM → 11:47 AM
2h 57m • 2 changes
9:35 AM → 12:32 PM
2h 57m • 2 changes
9:39 AM → 1:02 PM
3h 23m • 2 changes
10:20 AM → 1:18 PM
2h 58m • 2 changes
Show more

Frequently asked questions

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