The average bus between Port Glasgow and Dumbarton takes 2h and the fastest bus takes 1h 43m. The bus runs at least 2 times per hour from Port Glasgow 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.
Buses run every 30 minutes between Port Glasgow and Dumbarton. The earliest departure is at 5:30 AM in the morning, and the last departure from Port Glasgow is at 10:06 PM which arrives into Dumbarton at 12:00 AM. All services require a transfer at Waterloo Lane and take an average of 2h. The schedules shown below are for the next available departures.

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2h 5m • 1 changeWant to know about travelling from Port Glasgow 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 bus from Port Glasgow to Dumbarton. However, there are services departing from Bus Station and arriving at Riverside Lane station via Waterloo Lane station. The journey, including transfers, takes approximately 2h.
Port Glasgow to Dumbarton bus services, operated by McGills Buses, depart from Bus Station.
Port Glasgow to Dumbarton bus services, operated by First Greater Glasgow, arrive at Riverside Lane station.
The distance between Port Glasgow and Dumbarton is 7.5 km. The road distance is 26 km.
You can take a bus from Bus Station to Riverside Lane via Waterloo Lane and St Enoch subway in around 2h 3m.