The country's largest airline announced on Tuesday it will "gradually restart its operations" after days of canceled flights.

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

Passengers were still scrambling to rebook their flights home on Sunday, as Air Canada cancelled more commutes amid an ongoing labour dispute with the union representing more than 10,000 employees.

Air Canada is restoring services following a four-day strike, but schedule recovery may take more than a week, with Middle ...