More than 10,000 Air Canada flight attendants went on strike as of 12:58 a.m. ET Saturday, after the airline and the union representing them failed to reach a deal ahead of the deadline.

The Canada Union of Public Employees, or CUPE, gave a 72-hour strike notice on Wednesday after midnight. Air Canada responded shortly after by saying it would lock out workers, and began winding down operations on Thursday with a gradual suspension of flights.

With a work stoppage now in effect, Air Canada estimates that 130,000 customers will be affected each day of a strike, a figure that includes 25,000 Canadian travellers who are abroad.

The strike began after talks between CUPE and Air Canada reached an impasse, with wages and ground pay — which compensates flight attendants for work while the plan

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