The calculated distance (air line) between Langhirano and Castelnovo di Sotto is approximately 20 miles respectively 32 kilometers.
By car or train, the actual journey to Castelnovo di Sotto is certainly longer, as only the direct route (as the crow flies) between Langhirano and Castelnovo di Sotto has been calculated here.
Air line (approximately)
32 kilometers
17 nautical miles