This document provides details of a federal contract opportunity 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, effective April 26, 2017 to replace Refresh 17. The resultant contracts will be indefinite delivery, indefinite quantity contracts under GSA's Multiple Award Schedule program for a five year base period and three five-year option periods. Current contract holders under Schedule 599 for Travel Services Solutions do not need to reapply. The purpose is to provide government agencies an efficient means to obtain quality travel services from qualified contractors. Products and services covered include travel consultation, travel management center services, lodging services and management, specialized conference facilities, air charter services, and new related products and services.