The calculated distance (air line) between Villejuif and Cergy-Pontoise is approximately 21 miles respectively 34 kilometers.
By car or train, the actual journey to Cergy-Pontoise is certainly longer, as only the direct route (as the crow flies) between Villejuif and Cergy-Pontoise has been calculated here.
Air line (approximately)
34 kilometers
18 nautical miles