United Airlines offers a flexible cancellation policy to accommodate travelers’ changing plans. Passengers can cancel flights through the official website, mobile app, or customer service. If canceled within 24 hours of booking, customers are eligible for a full refund, provided the booking was made at least seven days before departure. After 24 hours, cancellation fees may apply depending on the ticket type. Refundable tickets allow full refunds, while non-refundable tickets may offer travel credits for future use. United's cancellation policy also considers special circumstances, such as emergencies or schedule changes, ensuring a customer-friendly experience. Contact United for detailed assistance.