The calculated distance (air line) between Castelnovo ne'Monti and Langhirano is approximately 14 miles respectively 23 kilometers.
By car or train, the actual journey to Langhirano is certainly longer, as only the direct route (as the crow flies) between Castelnovo ne'Monti and Langhirano has been calculated here.
Air line (approximately)
23 kilometers
12 nautical miles