The union representing Air Canada’s 10,000 flight attendants said on Sunday that it would defy a back-to-work order and continue a strike that shut down Canada’s dominant carrier and severely disrupt...

Air Canada flights are cancelled after thousands of flight attendants began a strike early Saturday morning.

Canada’s biggest airline is poised to start canceling several dozen flights Thursday ahead of a weekend lockout of flight attendants that threatens to throw travel plans for tens of thousands into ch...