A WestJet plane takes off as WestJet flight attendants hold a "Day of Action" while union members vote on a possible strike in Calgary, Tuesday, July 14, 2026. THE CANADIAN PRESS/Jeff McIntosh - The Canadian PressTORONTO — Some travellers headed into the long weekend on edge, as WestJet began its first round of cancellations ahead of a possible strike by flight attendants. The airline announced early Saturday morning that 81 of the day's scheduled flights were scrubbed. WestJet said the route with the highest number of cancellations was Toronto to Vancouver, with four. The union triggered a 72-hour strike notice that ends just after midnight Sunday in Calgary, where WestJet is headquartered, and the airline responded with a lockout notice on the same timeline.