The average bus between Dumbarton and Prestwick takes 2h 1m and the fastest bus takes 1h 42m. There is an hourly bus service 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 hourly between Dumbarton and Prestwick. The earliest departure is at 6:14 AM in the morning, and the last departure from Dumbarton is at 10:23 PM which arrives into Prestwick at 1:10 AM. All services require a transfer at James Watt Street and take an average of 2h 1m. The schedules shown below are for the next available departures.

1h 55m • 1 change
Arrives next day

2h 29m • 1 change
Arrives next day

2h 47m • 1 change

1h 49m • 1 change

1h 44m • 1 change

1h 57m • 1 change

2h 1m • 1 change

1h 49m • 1 change

1h 44m • 1 change

1h 57m • 1 change

2h 1m • 1 change
Want 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 Dumbarton station and arriving at Prestwick station via James Watt Street. The journey, including transfers, takes approximately 2h 1m.
Dumbarton to Prestwick bus services, operated by First Greater Glasgow, depart from Quay Street station.
Dumbarton to Prestwick bus services, operated by First Greater Glasgow, arrive at Saunterne Road station.
Book your Dumbarton to Prestwick bus tickets online with First Greater Glasgow and Stagecoach West Scotland.
The distance between Dumbarton and Prestwick is 49.7 km. The road distance is 80 km.
You can take a bus from Quay Street to Saunterne Road via James Watt Street and West Campbell Street in around 1h 57m.