The following are the key points of Sun Country cancellation policy:- If your flight is delayed by six hours or more, you may cancel it and get a full refund. You are entitled to a full refund if you cancel your flight within 24 hours and your initial flight departs at least 7 days (168 hours) from the time of booking. A non-refundable ticket cannot be cancelled after the 24-hour cancellation period has passed.