The calculated distance (air line) between Marly-la-Ville and Cergy-Pontoise is approximately 19 miles respectively 31 kilometers.
By car or train, the actual journey to Cergy-Pontoise is certainly longer, as only the direct route (as the crow flies) between Marly-la-Ville and Cergy-Pontoise has been calculated here.
Air line (approximately)
31 kilometers
17 nautical miles