The calculated distance (air line) between La Flèche and Cergy-Pontoise is approximately 135 miles respectively 218 kilometers.
By car or train, the actual journey to Cergy-Pontoise is certainly longer, as only the direct route (as the crow flies) between La Flèche and Cergy-Pontoise has been calculated here.
Air line (approximately)
218 kilometers
118 nautical miles