Passengers wait with baggage at Pearson. Photo by Arlyn McAdorey / Photographer: Arlyn McAdorey/Blo

(Bloomberg) — Air Canada’s flight attendants stayed on strike Monday even after the country’s labor board ordered them back to work, causing the airline to delay plans to restart flights.

The union representing some 10,500 flight staff said it wouldn’t ask members to return to their jobs, as a deadline set by the Canada Industrial Relations Board came and went at 12 p.m. Toronto time.

The impasse has grounded Canada’s largest airline since Saturday, disrupting travel for hundreds of thousands of people during the peak summer season. The union is seeking higher pay and compensation for periods the plane isn’t in motion, such as work they perform during boarding.

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