YYC is the three-letter airport code used to refer to the Calgary International Airport, which is located in Calgary, Alberta, Canada. This airport serves as the primary airport for the city of Calgary and the surrounding areas, providing both domestic and international flights.

The YYC airport code was originally assigned to the airport in 1971 when the International Air Transport Association (IATA) first began standardizing airport codes. Prior to this, the Calgary airport had a different code, but it was changed to better reflect the city's name.

The "YY" in YYC stands for "Y" which represents Canada, and "Y" is also the first letter in "Calgary". The "C" in YYC is simply the last letter of "Calgary".

The Calgary International Airport is the fourth busiest airport in Canada in terms of passenger traffic, serving over 18 million passengers per year. It is a hub for WestJet Airlines, one of Canada's largest airlines, and also serves as a focus city for Air Canada.

In addition to serving as a hub for commercial flights, the Calgary International Airport also serves as an important gateway for cargo shipments, handling over 130,000 tonnes of cargo per year.

The airport features two main terminals, with Terminal 1 handling domestic and international flights, while Terminal 2 is primarily used for US-bound flights. The airport offers a variety of amenities for travelers, including restaurants, shops, and lounges, as well as a range of parking options and ground transportation services.

In recent years, the Calgary International Airport has undergone significant renovations and upgrades to improve the overall passenger experience. These renovations have included expanded parking facilities, improved airport lounges, and upgrades to the airport's runways and other infrastructure.

Overall, the YYC airport code represents an important gateway to the city of Calgary and the surrounding areas, connecting travelers from across Canada and around the world to this vibrant and dynamic region.