The average train between Swansea and Brentford takes 3h 38m and the fastest train takes 3h 23m. There is a train service every few hours from Swansea to Brentford. 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 Brentford. The earliest departure is at 3:46 AM at night, and the last departure from Swansea is at 8:23 PM which arrives into Brentford at 11:58 PM. All services require a transfer at London Paddington and take an average of 3h 38m. The schedules shown below are for the next available departures.


4h 17m • 2 changes


3h 23m • 2 changes


3h 33m • 2 changes


3h 35m • 2 changes


4h 19m • 2 changes


3h 24m • 2 changes


3h 35m • 2 changes


3h 40m • 2 changes


4h 19m • 2 changes


3h 24m • 2 changes


3h 35m • 2 changes


3h 40m • 2 changes
Want to know about travelling from Swansea to Brentford? 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 Brentford. However, there are services departing from Swansea station and arriving at Brentford station via London Paddington. The journey, including transfers, takes approximately 3h 38m.
Swansea to Brentford train services, operated by Great Western Railway (GWR), depart from Swansea station.
Swansea to Brentford train services, operated by Great Western Railway (GWR), arrive at London Paddington station.
Book your Swansea to Brentford train tickets online with Great Western Railway (GWR) and London Underground (Tube).
The distance between Swansea and Brentford is 250.8 km. The road distance is 321 km.
Great Western Railway (GWR) operates a train from Swansea to London Paddington hourly. Tickets cost £85–160 and the journey takes 2h 52m.