About 200 Air Canada flights are to the U.S., according to The Wall Street Journal. The strike comes as Canadians increasingly avoid the United States because of diplomatic tensions between the neighbors. With more Canadians taking vacations at home, Air Canada has seen extra pressure on domestic routes.

Summer travelers are facing uncertainty as the clock winds down on a possible strike by Air Canada flight attendants, which the airline said would force it to cancel almost all of its scheduled flights as soon as Saturday.

Air Canada has suspended all its flights as a strike by cabin staff begins - a move the airline said will disrupt travel plans for around 130,000 passengers a day. The union representing more than 10,000 Air Canada flight attendants confirmed the 72-hour industrial action early on Saturday morning.