The "saving" piece is a discount, not just a lowest-available-rate guarantee, which has become a standard promise made by travel suppliers and online travel agencies alike. The discount varies, as follows: - A 2 percent discount on best-available rate for bookings made within 14 days of arrival - A 3 percent discount on best-available rate for bookings made 15 days or more prior to arrival, for stays Sunday - Thursday (Saturday - Wednesday in the Middle East) - A 10 percent discount on best-available rate for bookings made 15 days or more prior to arrival, for stays Friday - Saturday (Thursday - Friday in the Middle East) The best-available rate that Hilton uses as a starting point for the discounts is "a specific rate type that varies depending on time of purchase, is unrestricted, non-qualified and excludes discount rates." In other words, it may not be the best-available rate. Get the full story at Smarter Travel