The calculated distance (air line) between Altopascio and Castelfranco di Sotto is approximately 9 miles respectively 14 kilometers.
By car or train, the actual journey to Castelfranco di Sotto is certainly longer, as only the direct route (as the crow flies) between Altopascio and Castelfranco di Sotto has been calculated here.
Air line (approximately)
14 kilometers
7 nautical miles