Air Canada has delayed restarting flights until Monday evening after the union representing 10,000 flight attendants vowed to defy a government-backed back-to-work order.

Air Canada has suspended plans to restart operations after the union representing 10,000 flight attendants decided to defy a return-to-work order.

The decision by the union representing the 10,000 workers means that travel chaos will continue for at least a second day. Air Canada said it had suspended its reopening plan until Monday evening.