The average train between Cardiff and Dumbarton takes 8h and the fastest train takes 7h 4m. The train service runs several times per day from Cardiff 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 every 4 hours between Cardiff and Dumbarton. The earliest departure is at 4:33 AM at night, and the last departure from Cardiff is at 10:21 PM which arrives into Dumbarton at 9:59 AM. All services require a transfer at Crewe and take an average of 8h. The schedules shown below are for the next available departures.



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7h 6m • 3 changesWant to know about travelling from Cardiff 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 Cardiff to Dumbarton. However, there are services departing from Cardiff Central station and arriving at Glasgow Central station via Crewe station. The journey, including transfers, takes approximately 8h.
Cardiff to Dumbarton train services, operated by Transport for Wales, depart from Cardiff Central station.
Cardiff to Dumbarton train services, operated by Avanti West Coast, arrive at Glasgow Central station.
Book your Cardiff to Dumbarton train tickets online with Omio.
The distance between Cardiff and Dumbarton is 504.7 km. The road distance is 619 km.
You can take a train from Cardiff Central to Dumbarton Central via Crewe, Glasgow Central, Glasgow Central Low Level, and Hyndland in around 7h 38m.