The calculated distance (air line) between Soisy-sous-Montmorency and Pierrefitte-sur-Seine is approximately 3 miles respectively 5 kilometers.
By car or train, the actual journey to Pierrefitte-sur-Seine is certainly longer, as only the direct route (as the crow flies) between Soisy-sous-Montmorency and Pierrefitte-sur-Seine has been calculated here.
Air line (approximately)
5 kilometers
3 nautical miles