WestJet, Canada's second-largest airline, has cancelled over 150 flights impacting nearly 20,000 passengers due to a strike by the Aircraft Mechanics Fraternal Association. The union claims that the strike was necessary as a result of the airline's refusal to negotiate. The federal government issued a ministerial order for binding arbitration but the union has agreed to comply. WestJet has stated that flights will no longer be cancelled as a result. The strike, occurring during the Canada Day long weekend, has affected both international and domestic flights. The airline has vowed to hold the union accountable for the stress and costs caused by the strike. However, the union negotiating committee referenced an order by the Canada Industrial Relations Board indicating that strikes or lockouts are not explicitly prohibited during the arbitration process.