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