Great Lakes Airlines was an airline in Canada. It was formed in 1958 in Sarnia , Ontario by Mr. John Blunt and by 1983 became Air Ontario Ltd. In June 1987 Air Ontario Ltd merged with Austin Airways to form Air Ontario Inc.
Aircraft in service with the company in the 1970s, Convairs, were older, and were subject to vibrations during take-off, resulting in passengers nicknaming the company "Great Shakes"; the name Air Ontario prompted "Scare Ontario".