Associated with this will be a claim of bad faith. The Airlines persisted in selling airline tickets right up until the Canadian government made its more explicit return to Canada request and moved to stop international flights. This isn't about the stupidity of people who continued to fly. Rather it is about a business decision to keep selling tickets that the airlines were aware that they would not be able to honour. They were gambling with customer funds. The airlines had a duty of care to warn customers as far back as mid February as the pandemic grew that there was a strong likelihood that flights would be cancelled. It was evident this would explode even then. Yes, there was a responsibility of the customers to act in a prudent manner, but the airline industry dropped the ball on this.