The average train between London and Treforest takes 2h 47m and the fastest train takes 2h 26m. There is an hourly train service from London to Treforest. 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 London and Treforest. The earliest departure is at 5:23 AM in the morning, and the last departure from London is at 10:49 PM which arrives into Treforest at 5:56 AM. All services require a transfer, and take on average 2h 47m. The schedules shown below are for the next available departures.

2h 38m • 1 change

2h 34m • 1 change

2h 37m • 1 change

2h 35m • 1 change

3h 30m • 1 change

2h 35m • 1 change

2h 41m • 1 change

2h 35m • 1 change

3h 30m • 1 change

2h 35m • 1 change

2h 41m • 1 change

2h 35m • 1 change
Want to know about travelling from London to Treforest? 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 London to Treforest. However, there are services departing from London station and arriving at Treforest station via Cardiff Central. The journey, including transfers, takes approximately 2h 47m.
London to Treforest train services, operated by Great Western Railway (GWR), depart from London Paddington station.
London to Treforest train services, operated by Great Western Railway (GWR), arrive at Cardiff Central station.
Book your London to Treforest train tickets online with Great Western Railway (GWR) and Transport for Wales.
The distance between London and Treforest is 221.3 km. The road distance is 251 km.
Great Western Railway (GWR) operates a train from London Paddington to Cardiff Central hourly. Tickets cost £60–120 and the journey takes 1h 58m.