The union representing around 10,000 Air Canada flight attendants could signal its intent to strike if a deal isn't reached by the end of today.

Union representing flight attendants could declare its plans for a work stoppage by Wednesday at 12:01 a.m. ET

Air Canada flight attendants plan to picket at four airports on Monday to highlight their pay demands in contract negotiations with Canada's largest airline, but its operations will not be affected, the union said.