The calculated distance (air line) between Saint-Florentin and Saint-Quentin-en-Yvelines is approximately 95 miles respectively 152 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 Saint-Florentin and Saint-Quentin-en-Yvelines has been calculated here.
Air line (approximately)
152 kilometers
82 nautical miles