There are hundreds of airports in Canada. However, not all Canada airports have regularly scheduled flights. In fact, some small airports have no regularly scheduled passenger services. Some regional airports are only served by small "discount" airlines which do not make their fares available to major travel web sites. A good example is Arviat, Nunavut, which is served by Calm Air. For flights to and from Arviat, you would need to visit that airline's web site. Some of these airports are left out of our catalogue, while others are included.
