High Quality Content by WIKIPEDIA articles! Toronto Pearson International Airport, also known as Lester B. Pearson International Airport or simply Toronto Pearson, is a major international airport serving Toronto, Ontario, Canada. It is situated 27 km (17 mi) northwest of Downtown Toronto in the city of Mississauga, Ontario. It is the primary airport for a densely populated metropolitan region in southern Ontario including and surrounding the Greater Toronto Area known as the Golden Horseshoe.