Calgary International Airport (IATA: YYC, ICAO: CYYC), branded as YYC Calgary International Airport, is an international airport that serves the city of Calgary, Alberta, Canada. It is located approximately 17 kilometres (11 mi) northeast of downtown and covers an area of 20.82 square kilometres (8.04 sq mi; 5,144 acres; 2,082 ha). With 18.5 million passengers in 2023 and 124,108 aircraft movements in 2021, Calgary International is the busiest airport in Alberta and the fourth-busiest in Canada by passenger traffic. This airport is served by the Calgary International Airport Emergency Response Service for aircraft rescue and firefighting (ARFF) protection. The region's petroleum and tourism industries (and its proximity to Banff National Park) have helped foster growth at the airport, which has nonstop flights to an array of destinations in North and Central America, Europe, and Asia. Calgary serves as the headquarters and primary hub for WestJet.

Built in the late 1930s, the site has since grown to house: 71 gates at minimum (depending on airplane type), four runways and two terminal buildings with six concourses for passengers (Gates A1-6, A12-24, B31-40, C50-65, D70-79 and E80-97), warehouses for cargo handling, and other infrastructure. The Calgary Airport Authority operates the property while paying rent to the federal government. Close to the airport are the Deerfoot Trail and Stoney Trail freeways for transport into the city and surrounding area, and public transit also serves the airport.