Northwestern Air is an airline based in Fort Smith, Northwest Territories, Canada. It operates scheduled passenger services to seven destinations in two territories/provinces, as well as undertaking ad hoc charters and long-term charter contracts for various corporations throughout Canada and the United States.

The British Aerospace Jetstream is a small twin turboprop airliner, with a pressurised fuselage, developed as the Jetstream 31 from the earlier Handley Page Jetstream. A larger version of the Jetstream was also manufactured, the British Aerospace Jetstream 41.