Air Canada flight attendants on Saturday overwhelmingly voted against the airline's latest wage offer, their union said.

The tentative deal, which ended a strike at the airline last month, includes a 12 per cent salary increase this year for most junior flight attendants and an eight per cent bump for more senior members, followed by smaller raises in subsequent years.

The Canadian Union of Public Employees (CUPE) said in a statement that 99.1 per cent of members rejected the proposal, arguing flight attendants would still earn less than federal minimum wage.

"The wage issue is now in mediation and, if necessary, will be resolved in arbitration," the CUPE statement read.

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