The invention relates to an aircraft including a cabin and a door panel (6) comprising, facing the lintel (5) of the opening (3), a sealing strip (13) having a heel piece (14) secured to the internal face of the door panel (6) and a flexible flap (15) that can deform elastically. In addition, the lintel (5) comprises a supporting face (21) for supporting the flexible flap (15), which face is set back from the profile of the fuselage (2) at the junction between the fuselage and the supporting face, such that, when the door panel (6) is in the closed position, the flexible flap (15) extends over the supporting face and matches the profile of the fuselage.