The Brief

TORONTO - Air Canada halted its plan to resume operations on Sunday after the union representing 10,000 flight attendants vowed to defy a back-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.

What they're saying:

"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."

RELATED: Air Canada strike grounds flights, causing travel chaos for 130,000 passengers

Hancock said the "whole process has been unfair" and

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