The calculated distance (air line) between Cergy-Pontoise and Le Plessis-Bouchard is approximately 8 miles respectively 12 kilometers.
By car or train, the actual journey to Le Plessis-Bouchard is certainly longer, as only the direct route (as the crow flies) between Cergy-Pontoise and Le Plessis-Bouchard has been calculated here.
Air line (approximately)
12 kilometers
7 nautical miles