Delta Airlines allows passengers to change their flights with flexibility. Basic Economy tickets are non-refundable and non-changeable unless within 24 hours of booking. For other fare types, changes are generally permitted with applicable fees based on fare rules, route, and class of service. Same-day changes may be available for a fee. Delta may also allow free changes due to unforeseen events or schedule changes. The airline offers a risk-free cancellation policy within 24 hours of booking for most fare types. Passengers are encouraged to review Delta's official website or contact customer service for detailed and current Delta airlines flight change policy.