The average train between London Heathrow Airport (LHR) and Castle Street takes 3h 14m and the fastest train takes 2h 32m. There is a train service every few hours from London Heathrow Airport (LHR) 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 Heathrow Airport (LHR) and Castle Street. The earliest departure is at 6:32 AM in the morning, and the last departure from London Heathrow Airport (LHR) is at 11:18 PM which arrives into Castle Street at 5:20 AM. All services require a transfer at London Paddington and take an average of 3h 14m. The schedules shown below are for the next available departures.


2h 55m • 2 changes


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2h 46m • 2 changes


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3h 25m • 2 changes
Want to know about travelling from London Heathrow Airport (LHR) 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 Heathrow Airport (LHR) to Castle Street. However, there are services departing from London Heathrow Airport (LHR) station and arriving at Castle Street station via Taunton. The journey, including transfers, takes approximately 3h 14m.
London Heathrow Airport (LHR) to Castle Street train services, operated by Heathrow Express, depart from London Paddington station.
London Heathrow Airport (LHR) to Castle Street train services, operated by Heathrow Express, arrive at Taunton station.
Book your London Heathrow Airport (LHR) to Castle Street train tickets online with Heathrow Express and Great Western Railway (GWR).
The distance between London Heathrow Airport (LHR) and Castle Street is 181.2 km. The road distance is 271 km.
Great Western Railway (GWR) operates a train from London Paddington to Taunton hourly. Tickets cost £60–120 and the journey takes 1h 41m.