A high lift system with a main wing and control flaps (300, 400) and guiding devices for the positioning of the control flaps (300, 400), wherein the guiding devices are at least partially provided with a fairing, the high lift system comprising: a flow control device for purposes of influencing the flow around the main wing and control flaps (300, 400), wherein the flow control device is arranged at least partially withing the fairing with at least one inlet duct running along the main wing chordwise direction (H-KT) or being inclined to the main wing chordwise direction (H-KT), each inlet duct with at least one inlet, which is located underneath the lower surface of the main wing, and at least one outlet duct (30, 230, 330, 430), which is connected with the at least one inlet duct in a fluid-communicating manner, and has at least one outlet (232, 332, 432) so that fluid which is streaming into the inlet duct can be discharged through the outlet (232, 332, 432), wherein the outlet (232, 332, 432) is located on the upper surface (313, 413) of the at least one control flap (300, 400) and/or on the upper surface of the main wing in the rear third of the length of the main wing with respect to the main wing chordwise direction (H-KT), wherein the inlet of the at least one inlet duct is facing towards the main wing chordwise direction (H-KT), and wherein at least one inlet per inlet duct is arranged in the fairing in a range starting from the front of the fairing with respect to the main wing chordwise direction (H-KT) and extending to over one third of the fairing in the direction of the main wing chordwise direction (H-KT), wherein the fairing comprises at least two inlet ducts, each comprising at least one inlet, wherein two of these inlets are respectively disposed on flow surfaces extending in directions diverging from each other. a flow control device for purposes of influencing the flow around the main wing and control flaps (300, 400), wherein the flow control device is arranged at least partially withing the fairing with at least one inlet duct running along the main wing chordwise direction (H-KT) or being inclined to the main wing chordwise direction (H-KT), each inlet duct with at least one inlet, which is located underneath the lower surface of the main wing, and at least one outlet duct (30, 230, 330, 430), which is connected with the at least one inlet duct in a fluid-communicating manner, and has at least one outlet (232, 332, 432) so that fluid which is streaming into the inlet duct can be discharged through the outlet (232, 332, 432), wherein the outlet (232, 332, 432) is located on the upper surface (313, 413) of the at least one control flap (300, 400) and/or on the upper surface of the main wing in the rear third of the length of the main wing with respect to the main wing chordwise direction (H-KT), wherein the inlet of the at least one inlet duct is facing towards the main wing chordwise direction (H-KT), and wherein at least one inlet per inlet duct is arranged in the fairing in a range starting from the front of the fairing with respect to the main wing chordwise direction (H-KT) and extending to over one third of the fairing in the direction of the main wing chordwise direction (H-KT), wherein the fairing comprises at least two inlet ducts, each comprising at least one inlet, wherein two of these inlets are respectively disposed on flow surfaces extending in directions diverging from each other.