A work stoppage looms for around 10,000 Air Canada flight attendants after their union and the airline issued 72-hour strike and lockout notices, respectively, early Wednesday morning.

Air Canada says it will begin cancelling flights that were scheduled to take off Thursday, with increasingly more disruptions by the weekend if a last-minute deal can’t be reached before the work stoppage takes effect.

For summer travellers worried about what this means for their plans, here’s what you need to know.

Not yet. The Air Canada component of the Canadian Union of Public Employees has signalled its intent to go on strike as of early Saturday morning.

That notice was issued just before 1 a.m. ET on Wednesday. Half an hour later, Air Canada issued a notice that it also plans to lock out flight at

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