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.

Air Canada on Sunday delayed plans to resume limited operations after flight attendants defied a government-mandated back-to-work order and binding arbitration.