The average train between Swansea and Watford takes 3h 51m and the fastest train takes 3h 42m. There is a train service every few hours from Swansea to Watford. 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. 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 at 12:13 AM. All services require a transfer at London Paddington and take an average of 3h 51m. The schedules shown below are for the next available departures.


4h 25m • 2 changes


3h 42m • 2 changes


3h 44m • 2 changes


4h 1m • 2 changes


4h 25m • 2 changes


3h 42m • 2 changes


3h 44m • 2 changes


4h 1m • 2 changes


4h 25m • 2 changes


3h 42m • 2 changes


3h 44m • 2 changes


4h 1m • 2 changes
Want to know about travelling from Swansea to Watford? 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. However, there are services departing from Swansea station and arriving at Watford station via London Paddington. The journey, including transfers, takes approximately 3h 51m.
Swansea to Watford train services, operated by Great Western Railway (GWR), depart from Swansea station.
Swansea to Watford train services, operated by Great Western Railway (GWR), arrive at London Paddington station.
Book your Swansea to Watford train tickets online with Great Western Railway (GWR), London Underground (Tube) and London Overground.
The distance between Swansea and Watford is 244.8 km. The road distance is 330 km.
Great Western Railway (GWR) operates a train from Swansea to London Paddington hourly. Tickets cost £85–170 and the journey takes 2h 52m.