Air Canada flight attendants will defy the back-to-work order and remain on strike after the federal government ordered binding arbitration to end the work stoppage, the Canadian Union of Public Employees (CUPE) told Radio-Canada on Sunday.

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.