The calculated distance (air line) between Castellarano and Castelnovo ne'Monti is approximately 17 miles respectively 28 kilometers.
By car or train, the actual journey to Castelnovo ne'Monti is certainly longer, as only the direct route (as the crow flies) between Castellarano and Castelnovo ne'Monti has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles