Various applications in aerospace require a coupled solution of the surrounding airflow and structural response of the vehicle to the external loads. Flutter prediction is an essential part of design. Traditionally, fluid dynamics are solved using the simplified piston theory or steady solutions from CFD, which predict flutter behavior when coupled with a structural solver. An integrated solver consisting of a structural and fluid flow solver is developed and presented. The immersed boundary technique is used in the fluid solver to model time-varying geometry more efficiently, thereby reducing simulation time for the CFD solver. The weak formulation through the Newmark time integration scheme solves the structural formulation.