Canada’s government has forced Air Canada and the union representing flight attendants into arbitration after a work stoppage stranded more than 100,000 travelers around the world during the peak summer travel season.

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.

A walkout by flight attendants ended after about 12 hours with the imposition of binding arbitration. But getting travel back to normal will take days.