A combination of a lifting airframe and at least one carriage wherein: - the lifting airframe and the carriage comprise cooperating means for coupling/decoupling the carriage to/from the lifting airframe; - the lifting airframe comprises lifting surfaces including movable components driven by actuators, and propulsion means for allowing air transportation of said carriage when coupled to the lifting airframe; - the carriage has a tubular fuselage-like shape with a vertical plane of symmetry; - the carriage comprises at least a passenger cabin and/or a cargo compartment and landing gears; - the lifting aircraft or the carriage comprises a cockpit having control means of said lifting surfaces and said propulsion means for performing a flight operation when the carriage is coupled to the lifting airframe, characterised in that it comprises two carriages (15, 15'), wherein: - the lifting airframe also comprises a tubular fuselage having a vertical plane of symmetry comprising at least a passenger cabin and/or a cargo compartment and a nose landing gear; - the cockpit is placed in the front part of said tubular fuselage; - the lifting surfaces are fore and aft lifting surfaces (31, 33) configured for providing positive lift; - the lifting airframe is configured with a vertical plane of symmetry coincident with the plane of symmetry of the tubular fuselage; - the propulsion means comprise two engines (35, 37) mounted over the aft lifting surface at both sides of said vertical plane of symmetry; - the fore and aft lifting surfaces (31, 33) comprise first coupling/decoupling means (38, 38'; 39, 39') of said carriages (15, 15') in their lower skins at both sides of the vertical plane of symmetry; - the two carriages (15, 15') comprise second coupling/decoupling means (43, 45; 43', 45') to/from said lifting surfaces (31, 33) on their upper parts and landing gears (47, 47') in their rear ends. - the lifting airframe and the carriage comprise cooperating means for coupling/decoupling the carriage to/from the lifting airframe; - the lifting airframe comprises lifting surfaces including movable components driven by actuators, and propulsion means for allowing air transportation of said carriage when coupled to the lifting airframe; - the carriage has a tubular fuselage-like shape with a vertical plane of symmetry; - the carriage comprises at least a passenger cabin and/or a cargo compartment and landing gears; - the lifting aircraft or the carriage comprises a cockpit having control means of said lifting surfaces and said propulsion means for performing a flight operation when the carriage is coupled to the lifting airframe, - the lifting airframe also comprises a tubular fuselage having a vertical plane of symmetry comprising at least a passenger cabin and/or a cargo compartment and a nose landing gear; - the cockpit is placed in the front part of said tubular fuselage; - the lifting surfaces are fore and aft lifting surfaces (31, 33) configured for providing positive lift; - the lifting airframe is configured with a vertical plane of symmetry coincident with the plane of symmetry of the tubular fuselage; - the propulsion means comprise two engines (35, 37) mounted over the aft lifting surface at both sides of said vertical plane of symmetry; - the fore and aft lifting surfaces (31, 33) comprise first coupling/decoupling means (38, 38'; 39, 39') of said carriages (15, 15') in their lower skins at both sides of the vertical plane of symmetry; - the two carriages (15, 15') comprise second coupling/decoupling means (43, 45; 43', 45') to/from said lifting surfaces (31, 33) on their upper parts and landing gears (47, 47') in their rear ends.