Adding winglet is efficient when Aeroplan is cruising because the wing with winglet creates less drag and less negative lift. From the simulation it was found that the induced drag is reduced with the use of winglet. After changing the angle of contact from 0 to -5 degree the wing which doesn’t have winglet produce higher drag force than the wing which have winglet. And also, the wing which doesn’t consists of winglet produce lesser lift force than the other have the winglet after changing angle of contacts. The wing which don't have winglet has created higher density of vortex on the tip of the wing. However, on the other hand wing consists of winglet produces lesser density of vortex which is impending on the body of the wing. Vortex reduces the air pressure on the top of the wing which don’t have winglet. Low air pressure means higher the velocity on the tip of the wing and high velocity air produces more turbulence on the tip of the wing. The velocity magnitude is 1420ms-1 at 0 degree angle of contact, which don’t have winglet and 1394ms-1 which have winglet. So, when the Aeroplan is cruising higher the angle of attack higher will be the velocity a wing with winglet produces higher lift comparatively higher lift than the other doesn’t have the winglet. It is efficient to use winglet when the Aeroplan is cruising.