As peak holiday travel season approaches, flyers with Air Transat have been dealt an unexpected curveball. The airline’s pilots issued a 72-hour strike notice Sunday, raising the risk of a walkout later this week.

Some flights have already been cancelled and more disruption is expected in the days ahead.

Here’s what you need to know.

How did we get here?

On Sunday, the Air Line Pilots Association, which represents about 750 Air Transat pilots, issued a 72-hour strike notice. That means a walkout could start as early as 3 a.m. on Wednesday, Dec. 10.

Negotiations over a new collective agreement began in January 2025.

But after months of bargaining, talks broke down Nov. 18, triggering a 21-day cooling-off period that ended Sunday.

On Dec. 3, pilots voted 99 per cent in favour of strik

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