Story updated following tentative agreement between WestJet and its flight attendants' union. WestJet flights are beginning to resume after the airline reached a deal with striking flight attendants. Encore flies 35 de Havilland Canada Dash 8-Q400s from bases at Calgary International Airport (YYC) and Vancouver International Airport (YVR). Los Angeles International Airport (LAX), Harry Reid International Airport (LAS) in Las Vegas and Hartsfield-Jackson Atlanta International Airport (ATL) are its largest American gateways by departures. Why flight attendants went on strikeNeither the Canadian Union of Public Employees, which represents flight attendants at WestJet, nor the airline provided in-depth details of the tentative agreement reached Monday.