The Largs to Cumbrae ferry is the main way to get to Great Cumbrae Island. The route of the ferry used to go to Millport but these days it goes to Cumbrae Slip which is just over 3 miles from the old pier in Millport, the only town on the island.
The ferries on the route are modern. The older ship on the route is called the MV Loch Riddon while the MV Loch Shira came into service in 2007 which provides 32 cars and 250 passengers. It is a busy route and while the sailing is scheduled to take ten minutes, it is a little less.
In 1963, Cumbrae only received a ferry link on Mondays, Wednesdays and Fridays. This operated in conjunction with the Rothesay Ferry service out of Wemyss Bay, and arrived at Millport. The crossing took 50–80 minutes (depending on whether it went via Rothesay or not) and cost from £1 16s to £3.