For domestic travel, it isn't required to call to reconfirm your flight with Yahoo! Travel or an airline. However, some international airlines do require passengers to call and reconfirm their flights with the airline 24 to 72 hours prior to departure. For all flights we strongly recommend that you review your itinerary on-line using My Travel to ensure you know your current schedule. (Airlines do sometimes change flight numbers and times. These changes are reflected online). If you have any questions or concerns please call the airline directly.