The average bus between Dumbarton and Cairnryan takes 5h 57m and the fastest bus takes 4h 45m. The bus service runs several times per day from Dumbarton to Cairnryan. 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 4 hours between Dumbarton and Cairnryan. 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 Cairnryan at 9:18 AM. All services require a transfer at James Watt Street and take an average of 5h 57m. The schedules shown below are for the next available departures.



4h 47m • 3 changes



4h 55m • 3 changes



4h 53m • 3 changes



4h 58m • 3 changes



5h 4m • 3 changes



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5h 4m • 3 changes



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4h 53m • 3 changes



5h 4m • 3 changes



4h 47m • 3 changes



4h 55m • 3 changes



4h 53m • 3 changes



5h 4m • 3 changes



4h 47m • 3 changes



4h 55m • 3 changes



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4h 45m • 3 changes



4h 45m • 3 changes



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4h 54m • 3 changes
Want to know about travelling from Dumbarton to Cairnryan? 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 Cairnryan. However, there are services departing from Dumbarton station and arriving at Cairnryan station via James Watt Street. The journey, including transfers, takes approximately 5h 57m.
Dumbarton to Cairnryan bus services, operated by First Greater Glasgow, depart from Quay Street station.
Dumbarton to Cairnryan bus services, operated by First Greater Glasgow, arrive at Old Pier station.
The distance between Dumbarton and Cairnryan is 111.7 km. The road distance is 168 km.
You can take a bus from Quay Street to Old Pier via James Watt Street, West Campbell Street, Ayr Bus Station, and Henrietta Street in around 5h 5m.