Union officials defied an order by the Canada Industrial Relations Board to return to work Sunday, after the federal government used Section 107 of the Labour Code to force the two sides into binding arbitration. Air Canada earlier Monday extended a cancellation of all Air Canada and Air Canada Rouge flights through 4 p.m. ET on Tuesday. This report by The Canadian Press was first published Aug. 18, 2025. Companies in this story: (TSX:AC) The Canadian Press