Thiais is located in Paris city, France at the 48.765, 2.3961 coordinates. Distance from Thiais to other cities. are listed below, click on the city name to find distance between. Distance from Thiais to Cergy-Pontoise 38 km, to Saint-Quentin-en-Yvelines 28 km, to Boulogne-Billancourt 13 km. The green marker indicates the location of Thiais.