The calculated distance (air line) between Castelnovo ne'Monti and Casalgrande is approximately 19 miles respectively 31 kilometers.
By car or train, the actual journey to Casalgrande is certainly longer, as only the direct route (as the crow flies) between Castelnovo ne'Monti and Casalgrande has been calculated here.
Air line (approximately)
31 kilometers
17 nautical miles