National Airports System
Canada's National Airport System (NAS) was defined in the National Airports Policy published in 1994. It was intended to include all airports with an annual traffic of 200,000 passengers or more, as well as airports serving the national, provincial and territorial capitals.
Any airport sustaining an annual traffic of 200,000 passengers or more for a period of three years will be added to the NAS. Any non-capital airport falling below this threshold for a period of three years will be removed from the NAS. However, since the introduction of the policy only one, Iqaluit Airport, has been added and no airports have been removed despite dropping below 200,000 passengers, such as Montréal-Mirabel International Airport and Gander International Airport.
As of 1994, the 26 NAS airports served 94% of all scheduled passenger and cargo traffic in Canada.
NAS Airports 
- British Columbia
- Regina International Airport, YQR, 991,108
- Saskatoon John G. Diefenbaker International Airport, YXE, 1,102,924
- Winnipeg James Armstrong Richardson International Airport, YWG, 3,452,307
- Montréal-Pierre Elliott Trudeau International Airport, YUL, 12,032,699
- Montréal-Mirabel International Airport, YMX, n/a <200,000
- Québec City Jean Lesage International Airport, YQB, 1,099,915
- New Brunswick
- Newfoundland and Labrador
- Criteria for the NAS
- Airports in the national airports category (Appendix A)
- Airport Divestiture Status Report
- Passengers enplaned and deplaned on selected services — Top 50 airports