Toronto Pearson is the busiest airport in Canada and Air Canada's largest hub. Its Terminal 1 handles US-bound passengers through American border preclearance, so travelers clear US immigration in Toronto and land in the United States as domestic arrivals. The current schedule feed lists 214 airports in 78 countries connected to Toronto.
The Y in its YYZ code is a quirk of the Canadian system — nearly every Canadian airport code begins with it — and the code is well enough known to be the title of a Rush instrumental.
Lester B. Pearson International Airport is the 49th busiest airport in the world — it handled 47,300,000 passengers in 2025, according to ACI World's annual ranking.
The most frequently served routes for Lester B. Pearson International Airport connect to Vancouver (YVR), Calgary (YYC) and Montreal (YUL).
The longest connected route for Lester B. Pearson International Airport reaches Sydney (SYD). This flight covers a distance of 9,665 miles (15,555 km).