A high-lift system (100) with a main wing (112) and adjustable flaps (110) as well as guiding devices (130) for holding the adjustable flaps (110) and adjustment devices (120) for adjusting the adjustable flaps (110), wherein the respective guiding device (130) and/or adjustment device (120) at least in part comprise/comprises a fairing (118), comprising a flow influencing (10) device for influencing the flow around the high-lift system (100), with at least one inlet line (20) with at least one inlet that is situated on or below the bottom of the high- lift system (100), wherein, furthermore, at least one outlet line (30) for air is provided that comprises a fluid-communicating connection to the inlet line (10) and comprises at least one outlet situated at the top in the region of at least one adjustable flap (110) of the high-lift system (100).