The average train between Watford Junction and Swansea takes 3h 54m and the fastest train takes 3h 28m. There is a train service every few hours from Watford Junction to Swansea. 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 Watford Junction and Swansea. The earliest departure is at 5:57 AM in the morning, and the last departure from Watford Junction is at 11:42 PM which arrives into Swansea at 9:02 AM. All services require a transfer at Harrow & Wealdstone and take an average of 3h 54m. The schedules shown below are for the next available departures.


3h 38m • 2 changes

3h 37m • 2 changes

3h 38m • 2 changes

3h 32m • 2 changes

3h 34m • 2 changes

3h 37m • 2 changes

3h 28m • 2 changes

3h 41m • 2 changes

3h 33m • 2 changes

3h 35m • 2 changes

3h 41m • 2 changes

3h 42m • 2 changesWant to know about travelling from Watford Junction to Swansea? 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 Watford Junction to Swansea. However, there are services departing from Watford Junction station and arriving at Swansea station via Swansea. The journey, including transfers, takes approximately 3h 54m.
Watford Junction to Swansea train services, operated by Southern, depart from London Paddington station.
Watford Junction to Swansea train services, operated by Southern, arrive at Swansea station.
Book your Watford Junction to Swansea train tickets online with Southern, London Underground (Tube) and 2 other operators.
The distance between Watford Junction and Swansea is 244.8 km. The road distance is 331 km.
Great Western Railway (GWR) operates a train from London Paddington to Swansea hourly. Tickets cost £85–160 and the journey takes 2h 52m.