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, effective April 26, 2017 to replace Refresh 17. Resultant contracts will be indefinite delivery, indefinite quantity contracts under GSA's Multiple Award Schedule program with no need for current contract holders to reapply. The solicitation will have a five year base period and three five-year option periods and seeks to provide travel services including travel consultation, travel management center services, lodging management, air charter services, and new related products and services to government agencies in an efficient manner in accordance with applicable statutes and regulations.