Sannois is located in Paris city, France at the 48.9667, 2.25 coordinates. Distance from Sannois to other cities. are listed below, click on the city name to find distance between. Distance from Sannois to Cergy-Pontoise 15 km, to Saint-Quentin-en-Yvelines 27 km, to Boulogne-Billancourt 15 km. The green marker indicates the location of Sannois.