Billy Bishop Toronto City Airport (IATA: YTZ, ICAO: CYTZ), commonly known as the Toronto Island Airport, is a small airport located on the Toronto Islands in Toronto, Ontario, Canada. It is named after Air Marshal Billy Bishop, a Canadian World War I flying ace. The airport is used by civil aviation, air ambulances, and regional airlines using turboprop planes. It is accessed by passenger ferry. In 2011, it was ranked Canada's 9th-busiest airport and Ontario's third-busiest airport by passenger numbers and the 14th-busiest Canadian airport in terms of aircraft movements.