The calculated distance (air line) between Trouville-sur-Mer and Cergy-Pontoise is approximately 93 miles respectively 150 kilometers.
By car or train, the actual journey to Cergy-Pontoise is certainly longer, as only the direct route (as the crow flies) between Trouville-sur-Mer and Cergy-Pontoise has been calculated here.
Air line (approximately)
150 kilometers
81 nautical miles