Air Canada flight attendants say they have reached a “tentative” deal with the airline to end a strike over wages and ground work that has cancelled travel for half a million people worldwide.

Roughly 10,000 flight attendants walked off the job after midnight Saturday, insisting Air Canada had failed to address their demands for higher pay and compensation for unpaid ground work, including during boarding.

The attendants’ union defied two orders from a regulatory tribunal to return to work, forcing Air Canada to roll back plans to partially restore service.

But after resuming talks on Monday evening, the union said it had reached a potential deal with the airline that it would put to its members for consideration.