United Airlines has a cancellation policy that outlines the circumstances under which a refund may be issued. If you cancel a flight within 24 hours of booking and the flight is scheduled to depart at least a week later, you can typically receive a full refund. For non-refundable tickets, cancellations will generally result in travel credits for future use rather than cash refunds. However, if United cancels a flight due to unforeseen circumstances like weather or operational issues, passengers may receive a full refund or the option to rebook without penalties. It's advisable to check the specific terms associated with your ticket and contact United's customer service for detailed information regarding your cancellation and potential refund.