 Greyhound buses to Toronto Bus Terminal also service Waterloo at a stop on the University of Waterloo campus, with some trips operating via Guelph.The closest airport to Waterloo is the Region of Waterloo International Airport in nearby Breslau, but while it is a thriving general-aviation field, it is not heavily served by scheduled airlines.Most air travellers use Toronto's Lester B. Pearson International Airport or John C. Munro Hamilton International Airport.