Delta cancels 24-hour risk-free period permits customers to cancel their reservation and receive full reimbursement within 24 hours. This applies to all ticket types, including non-refundable tickets. Within 24 hours, customers can cancel their reservation, and the full amount of the original payment method will be refunded. The 24-hour cancellation policy is available for customers who are unsure about their travel plans and wish to cancel without penalty within 24 hours.