The average bus between Greenock and Dunbarton Castle takes 2h 9m and the fastest bus takes 1h 48m. The bus runs at least 2 times per hour from Greenock to Dunbarton Castle. 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 Greenock and Dunbarton Castle. The earliest departure is at 6:25 AM in the morning, and the last departure from Greenock is at 9:55 PM which arrives into Dunbarton Castle at 11:55 PM. All services require a transfer at Dundas Street and take an average of 2h 9m. The schedules shown below are for the next available departures.

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2h 11m • 1 changeWant to know about travelling from Greenock to Dunbarton Castle? 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 Greenock to Dunbarton Castle. However, there are services departing from Stance 1 station and arriving at Leven Street station via Dundas Street station. The journey, including transfers, takes approximately 2h 9m.
Greenock to Dunbarton Castle bus services, operated by McGills Buses, depart from Stance 1 station.
Greenock to Dunbarton Castle bus services, operated by First Greater Glasgow, arrive at Leven Street station.
The distance between Greenock and Dunbarton Castle is 12.4 km. The road distance is 32 km.
You can take a bus from Stance 1 to Dunbarton Castle via Dundas Street, Howard Street, and Leven Street in around 2h 33m.