If you are driving from Glasgow, take the M8 towards Greenock, then follow the A8 towards Gourock. From there, take the Western Ferries ferry to Dunoon. If you prefer to travel by rail, from Glasgow Central Station take the train to Gourock. From here, take the Western Ferries ferry to Dunoon. Another option is to take the scenic route from Glasgow to Dunoon via Loch Lomond and the Trossachs National Park, which takes approximately 2 hours and offers stunning views. If you are coming from Edinburgh, take the M9 towards Stirling and continue on the A811 towards Balloch, then follow signs towards the A82 and Loch Lomond. From here, take the A83 towards Inveraray and continue on to Dunoon.
The closest airport to Dunoon is Glasgow Airport, which is about 32 miles away. The most recommended route is taking the A82 road towards Glasgow City Centre and then joining the M8 motorway towards Glasgow Airport. Alternatively, one can take a ferry from Gourock to Dunoon, which takes around 25 minutes.