Aircraft comprising an air conditioning system for a cabin of the aircraft, the air conditioning system comprising: a pressurized air source which, when in its air operative mode, is configured to provide work air with a pressure higher than 60 kPa; and when in its air ground mode, is configured to provide work air with a pressure higher than 100 kPa; a ram air duct, in fluid connection with ambient air, comprising a first cross section where a boundary of the first cross section is defined; an air amplifier comprising an inlet for work air, a slot suitable for letting the work air exit the air amplifier towards the ram air duct, and a main fluid zone, the inlet being in fluid communication with the pressurized air source for receiving the work air from the pressurized air source, and the slot being arranged at the first cross section of the ram air duct in fluid communication with the ram air duct, and being configured to receive the work air and to exhaust this work air in the ram air duct by means of making the work air flows by a surface, in such a way that the work air exiting from the slot produces a suction effect in the ambient air in such a way that this ambient air flows along the ram air duct; an air distribution and control system, with an inlet and an outlet; a heat exchanger with a cold side and a hot side, the cold side comprising an inlet and an outlet and the hot side comprising an inlet and an outlet; wherein the air amplifier is arranged so that the ambient air is forced by the suction effect to pass from the inlet to the outlet of the cold side of the heat exchanger; wherein the outlet of the hot side of the heat exchanger is in fluid communication with one inlet of the air distribution and control system, at least one outlet of which is in turn in fluid communication with the cabin; wherein the air amplifier is arranged in the first cross section of the ram air duct upstream the inlet of the cold side of the heat exchanger, and wherein the slot is arranged in the boundary of the first cross section. a pressurized air source which, when in its air operative mode, is configured to provide work air with a pressure higher than 60 kPa; and when in its air ground mode, is configured to provide work air with a pressure higher than 100 kPa; a ram air duct, in fluid connection with ambient air, comprising a first cross section where a boundary of the first cross section is defined; an air amplifier comprising an inlet for work air, a slot suitable for letting the work air exit the air amplifier towards the ram air duct, and a main fluid zone, the inlet being in fluid communication with the pressurized air source for receiving the work air from the pressurized air source, and the slot being arranged at the first cross section of the ram air duct in fluid communication with the ram air duct, and being configured to receive the work air and to exhaust this work air in the ram air duct by means of making the work air flows by a surface, in such a way that the work air exiting from the slot produces a suction effect in the ambient air in such a way that this ambient air flows along the ram air duct; an air distribution and control system, with an inlet and an outlet; a heat exchanger with a cold side and a hot side, the cold side comprising an inlet and an outlet and the hot side comprising an inlet and an outlet; wherein the air amplifier is arranged so that the ambient air is forced by the suction effect to pass from the inlet to the outlet of the cold side of the heat exchanger; wherein the outlet of the hot side of the heat exchanger is in fluid communication with one inlet of the air distribution and control system, at least one outlet of which is in turn in fluid communication with the cabin; wherein the air amplifier is arranged in the first cross section of the ram air duct upstream the inlet of the cold side of the heat exchanger, and wherein the slot is arranged in the boundary of the first cross section.