WestJet Encore is a Canadian regional airline headquartered in Calgary, Alberta that operates feeder flights for WestJet, owned by the same parent company WestJet Airlines, Ltd. In response to internal market studies about future growth limitations by WestJet Airlines operating only Boeing 737 aircraft, WestJet Encore was formed in 2013 to allow the increased frequency of flights by using smaller aircraft and to expand service to routes with less traffic. Originally launching as a feeder airline for the mainline WestJet network out of WestJet hubs in Calgary and Toronto, the airline was refocused on Western Canada in 2021, with all service east of Thunder Bay cancelled and all aircraft either repositioned or stored.
SOURCE: Wikipedia