A wing for an airplane , said wing comprising: an outer wing end on an opposed side of said wing with regard to an inner side of the wing for mounting to the airplane , at least three winglets (8-10) on said outer wing end connected to said wing , an upstream first one of said winglets preceding a more downstream second one of said winglets, and said second winglet preceding an even more downstream third one of said winglets in a flight direction of said wing , said first winglet and said second winglet being mutually inclined, as seen against the flight direction, by a relative dihedral angle (δ1,2) in an interval from 37° to 80°, wherein said relative dihedral angle (δ1,2) is defined as the opening angle at said winglets' root of an isosceles triangle having one vertex on the root, namely at a splitting point of both winglets in horizontal direction and in the middle of the positions of leading edges of said winglets (8-10) in vertical direction, one vertex on the leading edge of said first winglet and one vertex on the leading edge of said second winglet , as seen in a projection against said flight direction, said triangle having a variable length of the two equal triangle sides, said relative dihedral angle interval being valid for at least 70 % of the equal side length along a shorter one of said first winglet and said second winglet , and wherein said second winglet has a spanwise length (b2) of between 105 % and 180 % of a spanwise length (b1) of said first winglet and said third winglet has a spanwise length (b3) of between 60 % and 100 % of the spanwise length (b2) of said second winglet . an outer wing end on an opposed side of said wing with regard to an inner side of the wing for mounting to the airplane , at least three winglets (8-10) on said outer wing end connected to said wing , an upstream first one of said winglets preceding a more downstream second one of said winglets, and said second winglet preceding an even more downstream third one of said winglets in a flight direction of said wing , said first winglet and said second winglet being mutually inclined, as seen against the flight direction, by a relative dihedral angle (δ1,2) in an interval from 37° to 80°, wherein said relative dihedral angle (δ1,2) is defined as the opening angle at said winglets' root of an isosceles triangle having one vertex on the root, namely at a splitting point of both winglets in horizontal direction and in the middle of the positions of leading edges of said winglets (8-10) in vertical direction, one vertex on the leading edge of said first winglet and one vertex on the leading edge of said second winglet , as seen in a projection against said flight direction, said triangle having a variable length of the two equal triangle sides, said relative dihedral angle interval being valid for at least 70 % of the equal side length along a shorter one of said first winglet and said second winglet , and wherein said second winglet has a spanwise length (b2) of between 105 % and 180 % of a spanwise length (b1) of said first winglet and said third winglet has a spanwise length (b3) of between 60 % and 100 % of the spanwise length (b2) of said second winglet . <EOS>