Analysis of information sources in references of the Wikipedia article "Air Canada" in English language version.
Air Canada's three hubs, Toronto (YYZ), the primary global hub, Montreal (YUL), a principal gateway to French and other international markets, Vancouver (YVR) the airline's premier gateway to the Asia-Pacific, offer Air Canada customers convenient connections under one roof, and Calgary (YYC) As a hub for western Canada and international markets.
Air Canada: ACA, AIR CANADA