Wikipedia
YTO
YTO is an airport metrocode that applies to the combined area of the following airports located in the Greater Toronto Area:
- Toronto/Buttonville Municipal Airport (IATA: YKZ)
- Billy Bishop Toronto City Airport (Toronto island) (IATA: YTZ)
- Toronto Pearson International Airport (IATA: YYZ)
- Region of Waterloo International Airport (IATA: YKF)