The Canadian Union of Public Employees contends that the government’s decision on Saturday to end the strike by taking it to binding arbitration is itself illegal and violates its members’ constitutional right to strike. It filed an application for an injunction to block the back to work order with the Federal Court of Canada over the weekend.

Air Canada had suspended all operations after more than 10,000 of the airline's flight attendants went on strike after a deadline to reach a deal passed