Flers is bordered to the north by the communes of Saint-Georges-des-Groseillers and Aubusson, to the north-east by Ronfeugerai, to the west by La Lande-Patry and Saint-Paul, to the south-west by La Chapelle-Biche, La Chapelle-au-Moine and Messei, and to the south-east by La Selle-la-Forge.
