The decision by the union representing the 10,000 workers means that travel chaos will continue for at least a second day. Air Canada said it had suspended its reopening plan until Monday evening.

A Canadian government panel ordered the flight attendants back to work, but they refused. The strike is affecting about 130,000 travelers around the world each day.

MONTREAL >> Air Canada flight attendants said on Sunday they would remain on strike despite a government-backed labor board’s order to return to work by 2 p.m. ET (1800 GMT), calling the order unconstitutional.