Les Ulis is located in Paris city, France at the 48.6817, 2.1694 coordinates. Distance from Les Ulis to other cities. are listed below, click on the city name to find distance between. Distance from Les Ulis to Cergy-Pontoise 40 km, to Saint-Quentin-en-Yvelines 15 km, to Boulogne-Billancourt 18 km. The green marker indicates the location of Les Ulis.