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...http://www.google.co.uk/patents/US5021953?utm_source=gb-gplus-sharePatent US5021953 - Trip planner optimizing travel itinerary selection conforming to individualized travel policies
