Customers who booked an Air Canada flight on or before Aug. 15 for travel on Saturday or Sunday can cancel for a full refund of the unused portion of their ticket, regardless of fare type, through the company’s website or mobile app. Travelers may also opt for a travel credit to use toward a future Air Canada booking.

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.