Calgary International Airport — Calgary, Canada

Calgary International Airport, identified by the code YYC, occupies a plateau on the northeastern edge of Calgary, Alberta, and ranks among the busiest airfields in Canada. What began as a small municipal field in the late 1930s, later used for wartime pilot training, evolved into the home base of WestJet, whose headquarters sits just minutes away. A dedicated international terminal opened in 2016, adding gates and customs capacity for growing long-haul demand to Europe and Asia. One of its parallel runways ranks among the longest in the country, letting widebody jets depart fully loaded even in Calgary's thin, high-altitude air. The field also handles substantial air cargo and general aviation traffic. Its most distinctive role, though, is as the main air gateway to the Canadian Rockies, sending travelers onward toward Banff, Lake Louise, and Kananaskis Country throughout the year.