Transwest Air was a scheduled and charter airline primarily serving the Canadian province of Saskatchewan. Its headquarters and main base was at Prince Albert. Transwest was formed in 2000 by the merger of Air Sask, established as La Ronge Aviation in 1960, and Athabaska Airways. The company offered not only scheduled passenger services, but fishing charters, surveying work, forest fire fighting, and medevac operations. In January 2021, it was announced that West Wind Aviation will be merged with Transwest Air, and would be renamed Rise Air.