Air Canada's unionized flight attendants walked off the job early on Saturday morning after contract talks with the country's largest carrier stalled, in a move that could disrupt travel plans for more than 100,000 passengers.

The union representing more than 10,000 Air Canada flight attendants confirmed the action in a social media post at around 0100 ET in the first strike by cabin crew since 1985.

Attendants are currently paid when the plane is moving and the union was seeking to also be compensated for time on the ground between flights and helping passengers board.

Montreal-based Air Canada, which is expected to respond quickly by locking out the workers, has said it anticipated canceling 500 flights by the end of Friday during the busy summer travel season. It expected around 10

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