Expedia cancellation policy varies depending on the type of booking: flights, hotels, or car rentals. Most flights are eligible for a 24-hour risk-free cancellation, allowing full refunds if canceled within 24 hours. Hotel cancellations depend on individual hotel policies, with many offering free cancellations if done within a specific period before check-in. Car rental cancellations usually allow free cancellation up to 24-48 hours before pick-up. Always check the specific terms and conditions associated with your booking to avoid any unexpected fees. For assistance, Expedia's customer support is readily available.