Being a member of Hilton Honors does not automatically grant you "free" cancellation on every booking; rather, it provides access to specific "Member Flexible Rates" that allow for easier changes. Hilton's cancellation policy is determined by the specific fare type you select at the time of booking. If you book a "Non-Refundable" or "Advance Purchase" rate—even as a Diamond member—you will likely lose your money if you cancel. However, Hilton Honors members typically benefit from a 48-hour to 72-hour cancellation window when booking standard rates, which is more flexible than the "Non-Refundable" options offered to the general public. In 2026, Hilton also offers "Semi-Flex" rates that provide a middle ground. It is important to note that during high-demand events or at specific luxury properties (like Waldorf Astoria), the cancellation window might be extended to 7 or 14 days. To ensure you have free cancellation, you must look for the "Fully Flexible" label in the app and be aware that these rates are generally slightly more expensive than the "Prepaid" options that carry strict penalties.