Air Canada flight attendants said on Sunday they will remain on strike and challenge a return-to-work order they called unconstitutional, defying a government decision to force them back to their duties by 2 p.

Despite a back-to-work order, Air Canada flight attendants are continuing their strike for at least one more day. CTV’s Jeremie Charron reports.

Air Canada all set to resume flights after government ended nationwide flight attendant strike. According to Reuters, Air Canada plans to resume flights later on Sunday, a day after the government issued a directive to end a cabin crew strike

Air Canada says operations will stay suspended despite the federal government ordering binding arbitration between the airline and the union representing its flight attendants.

Air Canada COO Mark Nasr called the strike action from CUPE, the union representing Air Canada’s flight attendants, ‘illegal.’

As Air Canada cancels flights in anticipation of a possible strike, experts say this could result in millions of dollars of delayed claims.