The average train between London and Dumbarton takes 5h 56m and the fastest train takes 5h 15m. There is a train service every few hours from London to Dumbarton. 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 Dumbarton. The earliest departure is at 5:31 AM in the morning, and the last departure from London is at 11:50 PM which arrives into Dumbarton at 8:00 AM. All services require a transfer at Glasgow Central and take an average of 5h 56m. The schedules shown below are for the next available departures.

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5h 30m • 1 changeWant to know about travelling from London to Dumbarton? 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 Dumbarton. However, there are services departing from London station and arriving at Dumbarton station via Glasgow Central. The journey, including transfers, takes approximately 5h 56m.
London to Dumbarton train services, operated by Avanti West Coast, depart from London Euston station.
London to Dumbarton train services, operated by Avanti West Coast, arrive at Glasgow Central station.
Book your London to Dumbarton train tickets online with Avanti West Coast, ScotRail and Caledonian Sleeper.
The distance between London and Dumbarton is 573.2 km. The road distance is 666 km.
Avanti West Coast operates a train from London Euston to Glasgow Central hourly. Tickets cost £140–230 and the journey takes 4h 31m. Caledonian Sleeper also services this route 6 times a week.