A major American airline, Delta Airlines, offers many local and international flights. It is well known for its excellent services and customer-focused qualities.' Learn more about the airline's cancellation policy prior to changing your plans for a Delta Airlines flight. Online flight cancellation is a simple process offered by Delta Airlines. Additionally, clients can file a refund request online by completing a form. Refunds are only available for qualified flight tickets that are cancelled within the allowed window of time. There are no refunds available after the ticket's expiration date. Refund requests may take some time to process, but they will be fulfilled in seven to ten working days.