TORONTO, ON — Air Canada said it suspended plans to restart operations on Sunday after the union representing 10,000 flight attendants said it will defy a return to work order.

The Canada Industrial Relations Board ordered airline staff back to work by 2 p.m. Sunday after the government intervened and Air Canada said it planned to resume flights Sunday evening.

Canada’s largest airline now says it will resume flights Monday evening.

“Our members are not going back to work,” Canadian Union of Public Employees national president Mark Hancock said earlier Sunday outside Toronto's Pearson International Airport. “We are saying no.”

Hancock said the “whole process has been unfair" and said the union will challenge what it called an unconstitutional order.

“Air Canada has really refused t

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