Air Canada said late Tuesday that is has been served a strike notice by the union representing its 8,600 mechanics, baggage handlers and cargo agents in Canada.
The airline said the International Association of Machinists and Aerospace Workers intends to begin labour action starting at 12:01 a.m. ET on Monday, March 12.
"We recognize that the IAMAW's notice of strike action in the midst of the peak March Break travel period will cause uncertainty for thousands of our customers. The lines of communication remain open and we are hopeful that there remains sufficient time to avoid a work disruption," Air Canada's executive vice-president and chief operating officer Duncan Dee said in a release.
"We regret the uncertainty for our customers and we thank them for their patience and understanding."
Last month, members of the union voted 65.6 per cent against a tentative labour deal that offered them wage, benefit and other increases.