The average bus between Dumbarton and Prestwick takes 2h 3m and the fastest bus takes 1h 42m. The bus runs at least 2 times per hour from Dumbarton to Prestwick. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Buses run every 30 minutes between Dumbarton and Prestwick. The earliest departure is at 6:14 AM in the morning, and the last departure from Dumbarton is at 10:24 PM which arrives into Prestwick at 1:13 AM. All services require a transfer at James Watt Street and take an average of 2h 3m. The schedules shown below are for the next available departures.

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2h 1m • 1 changeWant to know about travelling from Dumbarton to Prestwick? 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 bus from Dumbarton to Prestwick. However, there are services departing from Shopping Centre Entrance station and arriving at Saunterne Road station via James Watt Street station. The journey, including transfers, takes approximately 2h 3m.
Dumbarton to Prestwick bus services, operated by First Greater Glasgow, depart from Shopping Centre Entrance station.
Dumbarton to Prestwick bus services, operated by Stagecoach West Scotland, arrive at Saunterne Road station.
The distance between Dumbarton and Prestwick is 49.7 km. The road distance is 69 km.
You can take a bus from Shopping Centre Entrance to Saunterne Road via James Watt Street and West Campbell Street in around 2h 5m.