Under new re-regulated environment an open access to transmission systems is required. Transmission system operators (TSOs) are encouraged to use the existing facilities more efficiently. This paper focuses on the application of FACTS devices to improve voltage profile as well as maximum available transfer capability (ATC) considering lower prices. Real genetic algorithm (RGA) is used for optimization process and analytical hierarchy process (AHP) with fuzzy sets is used as a hybrid approach to evaluate the fitness function in an accurate fashion. Results show the effectiveness of the proposed methodology that are implemented via case studies.