Abstract: A method and system for communications routing provides an improved range of service quality and cost options. The method includes receiving at a host computer system an indication that a user has placed a telephone call. Next the host computer system receives from a routing database operatively connected to the host computer system both QoS criteria and cost criteria. The QoS criteria and cost criteria are then matched with empirical QoS data and least-cost routing data, respectively. A call route is then determined based on the matched QoS criteria and cost criteria with empirical QoS data and least-cost routing data, respectively. The routing database is then updated based on whether the determined call route provided an acceptable QoS.