Understanding the Delta Airlines cancellation policy can save you time and money when your travel plans change. Delta allows free cancellations within 24 hours of booking for a full refund, provided you purchased your ticket at least two days before departure. Under the Delta Airlines cancellation policy, non-refundable tickets typically convert to eCredits, while refundable fares qualify for full reimbursements. The airline also waives change fees for most flights, offering added flexibility.