Abstract: The invention is directed to a computer environment in which a management system for a transportation carrier, e.g., an airline carrier, generates routings in real-time. A routing module executing on a host computer system dynamically generates routings in real-time using a routings map as a mechanism for accessing up to date flight information stored in a central database. To reduce storage requirements in a multi-hosting environment, a single copy of flight information is maintained in the central database for each host airline and airline having a partnership agreement with a hosted airline. Consequently, as flight schedules and relationships between airlines change, possibly substantially continuously in a passenger environment, the management system may reduce the number of erroneous routings provided to an airline for use in booking passengers. Further, by reducing the number of erroneous routings, the number of requests submitted to the system may be reduced thereby increasing system performance.