Delta Airlines has a flexible cancellation policy designed to accommodate travelers' needs. If you need to cancel your flight, you can do so online or by contacting customer service at +1-866-738-0729. Generally, tickets can be canceled for a full refund within 24 hours of booking, provided the flight is at least a week away. For non-refundable tickets, cancellation may incur fees, but travel credits are often available for future use. Always check specific fare rules and conditions, as they can vary. For further assistance, reaching out to customer service can provide clarity on your options.