Toronto Pearson International Airport: History
In 1937, the Government of Canada agreed to support the building of two airports in the Toronto area. One site selected was on the Toronto Islands, which is the present-day Billy Bishop Toronto City Airport. The other site selected was at Elmbank, northwest of Toronto near the town of Malton in what was then Toronto Township (which would later become Mississauga to avoid confusion with the nearby city of Toronto), which was originally intended to serve as an alternate to the downtown airport but instead would become its successor due to having a much larger space without being constrained by Lake Ontario and Toronto Inner Harbour. The first scheduled passenger flight at the Malton Airport was a Trans-Canada Air Lines DC-3 that landed on August 29, 1939.
During the Second World War, the Royal Canadian Air Force established a base at the airport as a component of the British Commonwealth Air Training Plan. RCAF Station Malton was home to several training schools and was in operation between 1940 and 1946.
In 1958, the municipal government of Toronto sold the Malton Airport to the Government of Canada, which subsequently renamed the facility to Toronto International Airport, under the management of Transport Canada. The airport was officially renamed Lester B. Pearson International Airport on January 2, 1984, in honour of Toronto-born Lester B. Pearson, the 14th prime minister of Canada and recipient of the 1957 Nobel Peace Prize. The Greater Toronto Airports Authority (GTAA) assumed management, operation, and control of the airport in 1996, and has used the name Toronto Pearson International Airport for the facility since the transition.
Since Toronto has more than one airport, YTO is used for the area designation. At the same time, Pearson is coded YYZ, Billy Bishop Toronto City Airport is YTZ, and Toronto/Buttonville Municipal Airport in Markham, until its closure on November 24, 2023, was YKZ. YZ was the code for the station in Malton, Ontario, where Pearson Airport is located, and hence the IATA code for Pearson Airport is YYZ. The telegraph station in Toronto itself was coded TZ, which is why Toronto's smaller Billy Bishop Airport is coded YTZ.