The calculated distance (air line) between Ars-sur-Moselle and Saint-Quentin-en-Yvelines is approximately 185 miles respectively 298 kilometers.
By car or train, the actual journey to Saint-Quentin-en-Yvelines is certainly longer, as only the direct route (as the crow flies) between Ars-sur-Moselle and Saint-Quentin-en-Yvelines has been calculated here.
Air line (approximately)
298 kilometers
161 nautical miles