Mechanisms for managing a travel itinerary of a user are disclosed. More particularly, hardware and/or software for managing the user's travel itinerary based on the location of the user are disclosed. Embodiments may include receiving user location information and estimating the arrival time of the user at the departure point for a scheduled first trip of the user based on the user location information. Embodiments may also include comparing the estimated arrival time of the user at the destination with a departure time for the scheduled first trip and, if the arrival time is substantially earlier than the departure time or equal to or later than the departure time, rescheduling by the travel itinerary computer the user for a different second trip. Further embodiments may include transmitting notification to the user that he has been rescheduled to a second trip.