[4][5] From 1942 to end of World War II, it served as a training facility for the Royal Norwegian Air Force.

Known as "Little Norway", it replaced the Toronto Island Airport as their main training base in Canada.

[4] The Royal Canadian Air Force (RCAF) used Muskoka Airport as an auxiliary airfield to CFB Borden during World War II.

During the mid 20th century the airport was an emergency landing facility for Trans Canada Airlines and the RCAF.

In 2019 and 2022, Porter Airlines operated scheduled summer seasonal flights from Billy Bishop Toronto City Airport but the service did not resume in 2023.