The calculated distance (air line) between Arras and Saint-Quentin-en-Yvelines is approximately 111 miles respectively 178 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 Arras and Saint-Quentin-en-Yvelines has been calculated here.
Air line (approximately)
178 kilometers
96 nautical miles