In order to analyse the aerodynamic performance of aircraft winglet, a winglet is designed in Solid works and analysed in Ansys software. The tip vortex is the circulated flow of air near the wing tip which trails behind the wing when aircraft moves forward. The drag caused by the wing tip vortices aid the total drag in contributes significantly and causes many problems to aircraft like low stability, decreased lift, increased drag etc. the winglets reduce the drag due to tip vortices and increase the stability of wing during flight by reducing the total drag. Aircraft wings with winglet at various cant angles and without winglet is designed and analysed. The project shows the effect of winglets in the aerodynamic performance of wing and performance of aircraft wing at various cant angles of winglet. The results are compared and plotted. The winglet reduces the drag and increase the aerodynamic performance of aircraft wing and deceases the extra thrust needed to overcome this drag force due to tip vortices. Hence, also increase the fuel efficiency and stability of the aircraft.