Buffalo Niagara International Airport is an airport located in Cheektowaga CDP, Town of Cheektowaga, in Erie County, New York, USA. It is named after the Buffalo Niagara Falls metropolitan area. The airport serves Buffalo, New York as well as Southern Ontario, Canada (private land shuttle services connect Buffalo with Toronto Pearson International Airport in Mississauga, Ontario and John C. Munro International Airport in Hamilton, Ontario). It is the busiest airport in Upstate New York, and the third busiest in New York State by number of boardings.