The average train between Sarn and London takes 3h 14m and the fastest train takes 2h 34m. There is a train service every few hours from Sarn 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 Sarn and London. The earliest departure is at 6:29 AM in the morning, and the last departure from Sarn is at 10:27 PM which arrives into London at 7:16 AM. All services require a transfer, and take on average 3h 14m. The schedules shown below are for the next available departures.

2h 43m • 1 change

2h 49m • 1 change

2h 55m • 1 change

2h 45m • 1 change

2h 43m • 1 change

2h 49m • 1 change

2h 55m • 1 change

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2h 43m • 1 change

2h 49m • 1 change

2h 55m • 1 change

2h 45m • 1 change
Want to know about travelling from Sarn 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 Sarn to London. However, there are services departing from Sarn station and arriving at London station via Cardiff Central. The journey, including transfers, takes approximately 3h 14m.
Sarn to London train services, operated by Transport for Wales, depart from Sarn station.
Sarn to London train services, operated by Transport for Wales, arrive at London Paddington station.
Book your Sarn to London train tickets online with Transport for Wales and Great Western Railway (GWR).
The distance between Sarn and London is 239.2 km. The road distance is 268 km.
You can take a train from Sarn to London Paddington via Cardiff Central in around 2h 56m.