This document summarizes a federal contract opportunity notice issued by the General Services Administration. The GSA is issuing Solicitation Number QMAD-CY-090001-B, Refresh 18 for Multiple Award Schedule 599 Travel Services Solutions, replacing former Refresh 17. The resultant contracts will be indefinite delivery, indefinite quantity contracts under GSA's Multiple Award Schedule program with a five-year base period and three five-year option periods. The purpose is to provide travel services to government agencies through qualified contractors. Products and services covered include travel consultation, travel management center services, lodging management, specialized conference facilities, air charter services, and new related products and services.