Air Canada began canceling flights Thursday ahead of a possible strike by its flight attendants that could impact hundreds of thousands of travelers. A complete shutdown of the country's largest airline threatens to impact about 130,000 people a day.

Over 10,000 Air Canada flight attendants plan to strike on Saturday over stalled contract talks, threatening major travel disruptions across Canada.

Attendants union says there is still time to reach an agreement, as airline warns 100,000 passengers affected by Friday.