In this study, we present a detailed framework for aerodynamic and aeroelastic design of HAPS platform integrating an optimization procedure of key geometry design variables. In a first step, the given design variables were defined in order to evaluate the aerodynamic behavior represented by the lift to drag ratio (L/D) and wing loading. These analysis were performed to assess their effects on the wing’s aeroelasticity as a second step. The results of this study demonstrates that improving aspect ratio significantly improves (L/D) representing great aerodynamic performance and structural flexibility in one part but consequently increases wing loading in another part. Flutter analysis are conducted in order to define the critical speed hence to avoid dangerous oscillations and possible damages of the wing, in this context, an insight of safe range was provided. The findings of this study highlight the importance of multi-disciplinary approach in the goal of high performance with aeroelastic considerations for such HAPS platform.