Does JetBlue have a 24-hour cancellation policy? The 24-hour cancellation policy applies to JetBlue ????+????-????????????-{????????????}-???????????????????? tickets that are booked at least 7 days prior to the scheduled departure date. This means that if you book your JetBlue flight at least a week in advance, you have the option to cancel your reservation within 24 hours of booking and receive a full refund, without any additional fees or penalties.