UPDATE: Strike by 10,000 Air Canada flight attendants declared illegal

The Canada Industrial Relations Board declared a strike by 10,000 Air Canada flight attendants illegal Monday and ordered them back on the job after they ignored an earlier order to return to work and submit to arbitration.

The strike at Canada’s largest airline entered its third day on Monday and is affecting about 130,000 travelers per day during the peak summer travel season, and the two sides remain far apart on pay and other issues. Air Canada suspended plans to restart operations Sunday after the union defied an earlier return-to-work order.

Air Canada offers daily service to Indianapolis International Airport, but is scheduled to drop the service from late October until May 2026.

“The members of the union’s bargaining unit are directed to resume the performance of their duties immediately and to refrain from engaging in unlawful strike activities,” the Canada Industrial Relations Board board, or CIRB, said in a written decision.

The board, an independent administrative tribunal that interprets and applies Canada’s labor laws, said the union needs to provide written notice to all of its members by noon Monday that they must resume their duties.

It was not immediately clear what recourse the board or the government has if the union continues to refuse.

“We are in a situation where literally hundreds of thousands of Canadians and visitors to our country are being disrupted by this action,” Prime Minister Mark Carney said. “I urge both parties to resolve this as quickly as possible.”

Carney said his jobs minister would have more to say later. Carney said it was disappointing that talks have not led to a deal, and added that it is important that flight attendants are compensated fairly at all times.

The labor board previously ordered airline staff back to work by 2 p.m. Sunday and for the union to enter arbitration, after the government intervened. Air Canada then said it planned to resume flights Sunday evening. But when the workers refused, the airline said it would resume flights Monday evening instead. However, there was no sign that the Canadian Union of Public Employees, or CUPE, would relent.

Air Canada operates around 700 flights per day.

CUPE national President Mark Hancock on Sunday had ripped up a copy of the initial back-to-work order outside Toronto’s Pearson International Airport, and said members wouldn’t go back to work this week, to the cheers of picketing flight attendants.

Flight attendants walked off the job around 1 a.m. EDT on Saturday, after turning down the airline’s request to enter into government-directed arbitration, which allows a third-party mediator to decide the terms of a new contract.

Air Canada and CUPE have been in contract talks for about eight months, but remain far apart on the issue of pay and the unpaid work that flight attendants do when planes aren’t in the air.

The airline’s latest offer included a 38% increase in total compensation, including benefits and pensions, over four years, that it said “would have made our flight attendants the best compensated in Canada.”

But the union pushed back, saying the proposed 8% raise in the first year didn’t go far enough because of inflation.

Passengers whose flights are impacted will be eligible to request a full refund on the airline’s website or mobile app, according to Air Canada.

Last year, the government forced the country’s two major railroads into arbitration with their labor union during a work stoppage. The union for the rail workers is suing, arguing the government is removing a union’s leverage in negotiations.

Earlier story:

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 strike was already affecting about 130,000 travelers around the world per day during the peak summer travel season.

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. Air Canada said in a statement that the union “illegally directed its flight attendant members to defy a direction from the Canadian Industrial Relations Board.”

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

Hancock ripped up a copy of the back-to-work order outside the airport’s departures terminal where union members were picketing Sunday morning. He said they won’t return Tuesday either.

Flight attendants chanted “Don’t blame me, blame AC” outside Pearson.

Air Canada offers daily service to Indianapolis International Airport, but is scheduled to drop the service from late October until May 2026.

“Like many Canadians, the Minister is monitoring this situation closely. The Canada Industrial Relations Board is an independent tribunal,” Jennifer Kozelj, a spokeswoman for Federal Jobs Minister Patty Hajdu said in a emailed statement.

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

Less than 12 hours after workers walked off the job, Hajdu ordered the 10,000 flight attendants back to work, saying now is not the time to take risks with the economy and noting the unprecedented tariffs the U.S. has imposed on Canada. Hajdu referred the work stoppage to the Canada Industrial Relations Board.

The airline said the CIRB has extended the term of the existing collective agreement until a new one is determined by the arbitrator.

The shutdown of Canada’s largest airline early Saturday was impacting about 130,000 people a day. Air Canada operates around 700 flights per day.

Tourist Mel Durston from southern England was trying to make the most of sightseeing in Canada. But she said she doesn’t have a way to continue her journey.

“We wanted to go see the Rockies, but we might not get there because of this,” Durston said. “We might have to head straight back.”

James Hart and Zahara Virani were visiting Toronto from Calgary, Alberta, for what they thought would be a fun weekend. But they ended up paying $2,600 Canadian ($1,880) to fly with another airline on a later day after their Air Canada flight got canceled.

“It’s a little frustrating and stressful, but at the same time, I don’t blame the flight attendants at all,” Virani said. “What they’re asking for is not unreasonable whatsoever.”

Flight attendants walked off the job around 1 a.m. on Saturday. Around the same time, Air Canada said it would begin locking flight attendants out of airports.

The bitter contract fight escalated Friday as the union turned down Air Canada’s prior request to enter into government-directed arbitration, which allows a third-party mediator to decide the terms of a new contract.

Last year, the government forced the country’s two major railroads into arbitration with their labor union during a work stoppage. The union for the rail workers is suing, arguing the government is removing a union’s leverage in negotiations.

Hajdu maintained that her Liberal government is not anti-union, saying it is clear the two sides are at an impasse.

Passengers whose flights are impacted will be eligible to request a full refund on the airline’s website or mobile app, according to Air Canada.

The airline said it would also offer alternative travel options through other Canadian and foreign airlines when possible. Still, it warned that it could not guarantee immediate rebooking because flights on other airlines are already full “due to the summer travel peak.”

Air Canada and CUPE have been in contract talks for about eight months, but they have yet to reach a tentative deal. Both sides have said they remain far apart on the issue of pay and the unpaid work flight attendants do when planes aren’t in the air.

The airline’s latest offer included a 38% increase in total compensation, including benefits and pensions, over four years, that it said “would have made our flight attendants the best compensated in Canada.”

But the union pushed back, saying the proposed 8% raise in the first year didn’t go far enough because of inflation.