A packing method for producing a package of tobacco articles comprising: an inner container, which houses a wrapped group of tobacco articles, has an open top end, and comprises a lid hinged to the inner container along a hinge to close the open top end; an outer container housing the inner container so as to allow the inner container to slide with respect to the outer container between a closed configuration, in which the inner container is inserted inside the outer container, and an open configuration, in which the inner container is extracted partly from the outer container; and a sealing flap, which is hinged along a transverse fold line to a top edge of a front wall of the outer container, and is movable between a work position, in which the sealing flap is perpendicular to the front wall of the outer container and located beneath a top wall of the lid of the inner container, and a rest position, in which the sealing flap is substantially parallel to the front wall of the outer container; the packing method comprising the steps of: folding a first blank about the wrapped group of tobacco articles to form the inner container; and folding a second blank about the inner container to form the outer container; the packing method being characterized by comprising the further steps of: folding the second blank, except for the sealing flap, about the inner container, so as to leave the sealing flap in an initial position substantially coplanar with the front wall of the outer container; extracting the inner container partly from the outer container by sliding the inner container with respect to the outer container; folding the sealing flap 90° about the transverse fold line towards the open top end of the inner container and into the work position beneath the top wall of the lid of the inner container; and inserting the inner container fully inside the outer container by sliding the inner container with respect to the outer container. an inner container, which houses a wrapped group of tobacco articles, has an open top end, and comprises a lid hinged to the inner container along a hinge to close the open top end; an outer container housing the inner container so as to allow the inner container to slide with respect to the outer container between a closed configuration, in which the inner container is inserted inside the outer container, and an open configuration, in which the inner container is extracted partly from the outer container; and a sealing flap, which is hinged along a transverse fold line to a top edge of a front wall of the outer container, and is movable between a work position, in which the sealing flap is perpendicular to the front wall of the outer container and located beneath a top wall of the lid of the inner container, and a rest position, in which the sealing flap is substantially parallel to the front wall of the outer container; the packing method comprising the steps of: folding a first blank about the wrapped group of tobacco articles to form the inner container; and folding a second blank about the inner container to form the outer container; the packing method being characterized by comprising the further steps of: folding the second blank, except for the sealing flap, about the inner container, so as to leave the sealing flap in an initial position substantially coplanar with the front wall of the outer container; extracting the inner container partly from the outer container by sliding the inner container with respect to the outer container; folding the sealing flap 90° about the transverse fold line towards the open top end of the inner container and into the work position beneath the top wall of the lid of the inner container; and inserting the inner container fully inside the outer container by sliding the inner container with respect to the outer container. folding a first blank about the wrapped group of tobacco articles to form the inner container; and folding a second blank about the inner container to form the outer container; the packing method being characterized by comprising the further steps of: folding the second blank, except for the sealing flap, about the inner container, so as to leave the sealing flap in an initial position substantially coplanar with the front wall of the outer container; extracting the inner container partly from the outer container by sliding the inner container with respect to the outer container; folding the sealing flap 90° about the transverse fold line towards the open top end of the inner container and into the work position beneath the top wall of the lid of the inner container; and inserting the inner container fully inside the outer container by sliding the inner container with respect to the outer container. folding the second blank, except for the sealing flap, about the inner container, so as to leave the sealing flap in an initial position substantially coplanar with the front wall of the outer container; extracting the inner container partly from the outer container by sliding the inner container with respect to the outer container; folding the sealing flap 90° about the transverse fold line towards the open top end of the inner container and into the work position beneath the top wall of the lid of the inner container; and inserting the inner container fully inside the outer container by sliding the inner container with respect to the outer container.