Air Canada suspended its financial guidance through year-end, citing the impact of a strike by flight attendants that has caused the airline to scrap its entire flying schedule.

Air Canada has called off its plans to resume flights on Sunday after the union representing 10,000 flight attendants announced it would defy a return-to-work order.

The union said no, setting up an almost unprecedented standoff with the Canadian government, which had requested the back-to-work order.