Abstract: A travel planner system automatically constructs itineraries with available seats for a traveler's trip request which conform to pre-stored reasonableness standards which includes a satisfactory check on whether a connecting flight distance exceeds that of a possible direct flight by a preset distance or ratio. The system finds the fares in a process which includes constructing sum-of-segments fares for each such itinerary which are valid under all the applicable airline tariffs and rules, finds itinerary-with-fare combinations acceptable in terms of cost and convenience to the traveler in accordance with an individualized travel policy of the traveller, and displays at least some of the itineraries by departure or arrival time.