Island Seaway is a ferry that once served the route between Adelaide and Kangaroo Island in South Australia.^[1]

The vessel was built in Port Adelaide by the Eglo Engineering Company, commencing service in 1987 in replacement of the Troubridge. It had a Gross Tonnage of 3,536 and a Net Tonnage of 1,680.^[2]

In 1995 the vessel was sold to Malta. It is now named Flying Viking and classified as an accommodation vessel.^[3]