The average train between Harpenden and Watford Junction takes 53 min and the fastest train takes 45 min. The train runs at least 3 times per hour from Harpenden 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.
Trains run every 20 minutes between Harpenden and Watford Junction. The earliest departure is at 4:47 AM at night, and the last departure from Harpenden is at 5:08 PM which arrives into Watford Junction at 5:59 PM. All services require a transfer at London St Pancras Intl and take an average of 53 min. The schedules shown below are for the next available departures.

1h • 1 change

1h 12m • 1 change

1h 1m • 1 change

57 min • 1 change
Want to know about travelling from Harpenden 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.
No, there is no direct train from Harpenden to Watford Junction. However, there are services departing from Harpenden station and arriving at Watford Junction station via London St Pancras Intl. The journey, including transfers, takes approximately 53 min.
Harpenden to Watford Junction train services, operated by Thameslink, depart from Harpenden station.
Harpenden to Watford Junction train services, operated by Thameslink, arrive at Watford Junction station.
Book your Harpenden to Watford Junction train tickets online with Thameslink, Avanti West Coast and West Midlands Trains.
The distance between Harpenden and Watford Junction is 17.3 km. The road distance is 68 km.
You can take a train from Harpenden to Watford Junction via London St Pancras Intl and London Euston in around 1h 1m.