Union leaders for Air Canada’s flight attendants said members would return to work after a deal was reached to end a three-day strike that grounded hundreds of flights, hitting around 500,000 customers.

An ongoing labor dispute between Air Canada and its 10,000 flight attendants is wreaking havoc for half a million travelers and counting.

The Canadian Union of Public Employees, which represents the flight attendants, had continued to strike even after the Canada Industrial Relations Board declared it unlawful.