Calgary International Airport, (IATA: YYC, ICAO: CYYC), is an international airport that serves Calgary, Alberta, Canada and the surrounding region; it is situtated approximately 17 km (11 mi) northeast of the downtown core. The airport offers scheduled daily nonstop flights to major cities in Canada, Europe and the United States. Calgary International Airport is the base city of WestJet Airlines, is a hub of flag carrier Air Canada, and is also a hub for Air Canada Jazz. The airport is one of 8 Canadian airports that has US Border Pre-clearance facilities.

The terminal has three concourses, one of which is officially split into two, to accommodate transborder and international flights: Concourse A comprises Gates 1 to 19, Gates 20-29 are swing gates between Concourse B and C. Any US bound flight is treated as a "C" Gate, whereas any Canadian-bound/International-bound flight is treated as a "B" Gate. Concourse A and B are connected behind security by a walkway, facilitating connections for Air Canada flights. When all Gates in the B/C section are "C" gates, then this walkway is closed due to US Customs & Border Protection preclearance for USA-destined flights. All Air Canada international flights and some domestic flights depart from the B concourse. During Domestic and International operations the B Concourse security facilities (two lanes) are open. Passengers utilise the Concourse A security facilities during off-peak periods.