The cancellations of Canadian airline Westjet's 150 flights hitting 20,000 passengers followed after the union of maintenance workers called for a strike. The Aircraft Mechanics Fraternal Association stated that its members began striking on Friday evening, June 28, due to the airline’s refusal to engage in negotiations with the union, which they deemed unavoidable. The strike occurred after the federal government issued a ministerial order for binding arbitration on Thursday, following two weeks of tumultuous negotiations with the union over a new agreement. The unexpected strike, impacting both international and domestic flights, is occurring over the Canada Day long weekend.