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.

The union representing thousands of striking Air Canada flight attendants says it will risk jail time and fines but will not order its members back to work, despite the federal labour relations board calling the strike illegal.

TORONTO (AP) — Air Canada said Tuesday it will gradually restart operations after reaching an agreement with the union for 10,000 flight attendants to end a strike that disrupted the travel plans of hundreds of thousands of travelers.