The average train between Treforest and London takes 2h 41m and the fastest train takes 2h 23m. There is an hourly train service from Treforest to London. 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 Treforest and London. The earliest departure is at 5:17 AM in the morning, and the last departure from Treforest is at 11:27 PM which arrives into London at 7:16 AM. All services require a transfer, and take on average 2h 41m. The schedules shown below are for the next available departures.

2h 26m • 1 change

2h 30m • 1 change

2h 28m • 1 change

2h 27m • 1 change

2h 27m • 1 change

2h 30m • 1 change

2h 44m • 1 change

2h 26m • 1 change

2h 27m • 1 change

2h 30m • 1 change

2h 44m • 1 change

2h 26m • 1 change
Want to know about travelling from Treforest to London? 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 Treforest to London. However, there are services departing from Treforest station and arriving at London station via London Paddington. The journey, including transfers, takes approximately 2h 41m.
Treforest to London train services, operated by Transport for Wales, depart from Cardiff Central station.
Treforest to London train services, operated by Transport for Wales, arrive at London Paddington station.
Book your Treforest to London train tickets online with Transport for Wales and Great Western Railway (GWR).
The distance between Treforest and London is 221.3 km. The road distance is 251 km.
Great Western Railway (GWR) operates a train from Cardiff Central to London Paddington hourly. Tickets cost £60–120 and the journey takes 2h 6m.