The union for 10,000 striking Air Canada flight attendants said on Monday they won’t return to work even though the strike, now in its third day, has been declared illegal.

The World Archery Youth Championships are among the events happening in Winnipeg currently impacted by a strike of Air Canada flight attendants. A local Ukrainian ensemble discusses how flight cancellations have kept them from the festival circuit in Columbia.

The Canadian carrier said it expects to call off 500 flights by the end of Friday. Air Canada said it was suspending its schedule and trying to get passengers booked with other airlines to limit disruptions.