Https://community.smartsheet.com/profile/204916/Delta_Li {{DELta-AIRLines}} How long do I have to cancel a Delta flight without penalty? How long do I have to cancel a Delta flight without penalty? Delta offers a full refund if you cancel within 24 hours of purchase????+1-833-816-0098, as long as the flight was bought at least 7 days prior to departure. For more information, rea... https://community.smartsheet.com/profile/204916/Delta_Li