The calculated distance (air line) between Saint-Quentin-en-Yvelines and Clichy is approximately 16 miles respectively 26 kilometers.
By car or train, the actual journey to Clichy is certainly longer, as only the direct route (as the crow flies) between Saint-Quentin-en-Yvelines and Clichy has been calculated here.
Air line (approximately)
26 kilometers
14 nautical miles