Abstract: This paper aims to convert the aerodynamic shape of a conventional aerial subsonic flying body into a glide one by providing a range extension kit and fins. It describes the selection of configuration and airfoils depending on the tactical requirements and flight regimes. The wing and fins sizing is obtained using three different methods subjected to geometric constraints. The first method is an iterative optimization method using linear aerodynamic data. The second method is a genetic algorithm multi-objective function aims to maximize stability, controllability and lift-drag ratio within certain weights using linear aerodynamic data. The third method is a genetic algorithm optimization function integrated with MISSILE DATCOM aims to maximize lift-drag ratio. Then perform a direct uncontrolled six degree of freedom simulation for the three optimized designs and the conventional flying body. Comparing the results of ranges for these bodies reveals that the third method has the best range over the other designs including the conventional flying body.