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 carrier had earlier offered a 38% increase in total compensation for flight attendants over four years, with a 25% raise in the first year, which the union deemed insufficient.