The calculated distance (air line) between San Giovanni in Persiceto and Castel Maggiore is approximately 10 miles respectively 16 kilometers.
By car or train, the actual journey to Castel Maggiore is certainly longer, as only the direct route (as the crow flies) between San Giovanni in Persiceto and Castel Maggiore has been calculated here.
Air line (approximately)
16 kilometers
8 nautical miles