More than 600 flights across WestJet’s network were cancelled between Friday and Sunday as a result of the walkout. WestJet Airlines Boeing 737 MAX 8 at Calgary International Airport (Image: Calgary Planes)In a statement, the airline said: “We recognise the decision to strike is not an easy one. “Passengers due to travel on affected services are advised to refer to the WestJet website.” Travellers booked on upcoming flights have also been urged by the airline to check for updates online. The service operates four times a week using Boeing 737 MAX aircraft.