The average train between London and Castle Street takes 2h 46m and the fastest train takes 2h 1m. There is a train service every few hours from London to Castle Street. 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 Castle Street. The earliest departure is at 7:02 AM in the morning, and the last departure from London is at 11:45 PM which arrives into Castle Street at 5:20 AM. All services require a transfer at Taunton and take an average of 2h 46m. The schedules shown below are for the next available departures.

2h 25m • 1 change

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2h 54m • 1 change

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2h 26m • 1 change

2h 25m • 1 change

2h 15m • 1 change

2h 54m • 1 change

2h 26m • 1 change

2h 25m • 1 change

2h 15m • 1 change

2h 54m • 1 change

2h 26m • 1 change

2h 25m • 1 change

2h 15m • 1 change

2h 54m • 1 change
Want to know about travelling from London to Castle Street? 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 Castle Street. However, there are services departing from London station and arriving at Castle Street station via Taunton. The journey, including transfers, takes approximately 2h 46m.
London to Castle Street train services, operated by Great Western Railway (GWR), depart from London Paddington station.
London to Castle Street train services, operated by Great Western Railway (GWR), arrive at Taunton station.
Book your London to Castle Street train tickets online with Great Western Railway (GWR).
The distance between London and Castle Street is 204.2 km. The road distance is 248 km.
Great Western Railway (GWR) operates a train from London Paddington to Taunton hourly. Tickets cost £60–120 and the journey takes 1h 40m.