Saint-Denis is located in Paris city, France at the 48.9333, 2.3667 coordinates. Distance from Saint-Denis to other cities. are listed below, click on the city name to find distance between. Distance from Saint-Denis to Cergy-Pontoise 24 km, to Saint-Quentin-en-Yvelines 31 km, to Boulogne-Billancourt 14 km. The green marker indicates the location of Saint-Denis.