An aircraft , comprising: a fuselage , wherein the fuselage comprises an outer fuselage skin that at least partially defines an outer surface of the fuselage; and a wing assembly operably coupled to the fuselage via a wing-to-fuselage joint , wherein the wing assembly comprises: a left wing region comprising a lower left-wing-region skin that at least partially defines a lower left-wing-region airfoil surface and an upper left-wing-region skin that at least partially defines an upper left-wing-region airfoil surface ; a right wing region comprising a lower right-wing-region skin that at least partially defines a lower right-wing-region airfoil surface and an upper right-wing-region skin that at least partially defines an upper right-wing-region airfoil surface ; and a center wing region between the left wing region and the right wing region and comprising a lower center-wing-region skin ; wherein: the wing-to-fuselage joint includes a single skin segment that at least partially defines both the outer fuselage skin and the lower center-wing-region skin; and the single skin segment further at least partially defines at least one of the lower left-wing-region skin and lower right-wing-region skin . a fuselage , wherein the fuselage comprises an outer fuselage skin that at least partially defines an outer surface of the fuselage; and a wing assembly operably coupled to the fuselage via a wing-to-fuselage joint , wherein the wing assembly comprises: a left wing region comprising a lower left-wing-region skin that at least partially defines a lower left-wing-region airfoil surface and an upper left-wing-region skin that at least partially defines an upper left-wing-region airfoil surface ; a right wing region comprising a lower right-wing-region skin that at least partially defines a lower right-wing-region airfoil surface and an upper right-wing-region skin that at least partially defines an upper right-wing-region airfoil surface ; and a center wing region between the left wing region and the right wing region and comprising a lower center-wing-region skin ; a left wing region comprising a lower left-wing-region skin that at least partially defines a lower left-wing-region airfoil surface and an upper left-wing-region skin that at least partially defines an upper left-wing-region airfoil surface ; a right wing region comprising a lower right-wing-region skin that at least partially defines a lower right-wing-region airfoil surface and an upper right-wing-region skin that at least partially defines an upper right-wing-region airfoil surface ; and a center wing region between the left wing region and the right wing region and comprising a lower center-wing-region skin ; wherein: the wing-to-fuselage joint includes a single skin segment that at least partially defines both the outer fuselage skin and the lower center-wing-region skin; and the single skin segment further at least partially defines at least one of the lower left-wing-region skin and lower right-wing-region skin . the wing-to-fuselage joint includes a single skin segment that at least partially defines both the outer fuselage skin and the lower center-wing-region skin; and the single skin segment further at least partially defines at least one of the lower left-wing-region skin and lower right-wing-region skin . <EOS>