Mark Nasr, Air Canada's chief operations officer, said that cancellations would go from "several dozens" on Thursday, to some 500 by the end of Friday, to the airline being "completely grounded" at the start of the strike on Saturday, in the absence of a resolution.

Air Canada started canceling flights on Thursday ahead of a possible work stoppage by flight attendants that could affect hundreds of thousands of travelers.

Air Canada has started canceling flights ahead of a possible work stoppage by flight attendants that could impact hundreds of thousands of travelers.