Air Canada says it has suspended plans to resume limited operations after the union representing the airline's flight attendants said Sunday it will defy a federal back-to-work order for binding arbitration to end the work stoppage.

John Gradek, a former Air Canada executive and McGill University faculty lecturer in aviation management, joins Global News to discuss the decision by the union representing Air Canada flight attendants to defy a back-to-work order – and what could happen next.

It could be another chaotic day for travellers as a labour dispute continues between Air Canada and the union representing its flight attendants.