The average train between Swansea and Watford Junction takes 3h 56m and the fastest train takes 3h 46m. There is a train service every few hours from Swansea 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 hourly between Swansea and Watford Junction. The earliest departure is at 3:46 AM at night, and the last departure from Swansea is at 8:23 PM which arrives into Watford Junction at 12:17 AM. All services require a transfer at London Paddington and take an average of 3h 56m. The schedules shown below are for the next available departures.


3h 55m • 2 changes


3h 55m • 2 changes


3h 55m • 2 changes


3h 55m • 2 changes


4h 29m • 2 changes


3h 46m • 2 changes


3h 48m • 2 changes


4h 5m • 2 changes


4h 29m • 2 changes


3h 46m • 2 changes


3h 48m • 2 changes


4h 5m • 2 changes
Want to know about travelling from Swansea 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 Swansea to Watford Junction. However, there are services departing from Swansea station and arriving at Watford Junction station via London Paddington. The journey, including transfers, takes approximately 3h 56m.
Swansea to Watford Junction train services, operated by Great Western Railway (GWR), depart from Swansea station.
Swansea to Watford Junction train services, operated by Great Western Railway (GWR), arrive at London Paddington station.
Book your Swansea to Watford Junction train tickets online with Great Western Railway (GWR), London Underground (Tube) and London Overground.
The distance between Swansea and Watford Junction is 244.8 km. The road distance is 331 km.
Great Western Railway (GWR) operates a train from Swansea to London Paddington hourly. Tickets cost £85–170 and the journey takes 2h 52m.