Portimonense won the 2016–17 LigaPro to return to the top flight after six years; the campaign was managed by Vítor Oliveira, who had begun his coaching career with the club three decades earlier and had won promotion for the fifth consecutive time. The team went down on the last day of the 2019–20 season, as competitors C.D. Tondela and Vitória de Setúbal also won their games, however, Portimonense remained in the division due to issues off the pitch at both Vitória de Setúbal and C.D. Aves meaning these two were relegated and the Algarve side would stay up.