I want to cancel reservations I have made. Your entire reservation will be canceled, including any car, hotel, and air segments. This button will not be displayed if you do not have any existing reservations. I saw a lower airfare advertised today. There are several reasons this may occur.
Airlines generally restrict the number of seats which can be sold at a discounted fare.
Those seats may have already been sold. Most discounted fares have restrictions such as a minimum stay required or even the time of day you can travel. Occasionally a special advertised fare may only be available for purchase from a particular company. The advertisement should outline those restrictions. Just because a fare is shown on this list does not necessarily mean it is available on the flights or dates you most prefer.