The calculated distance (air line) between Castrocaro Terme e Terra del Sole and Monza is approximately 163 miles respectively 262 kilometers.
By car or train, the actual journey to Monza is certainly longer, as only the direct route (as the crow flies) between Castrocaro Terme e Terra del Sole and Monza has been calculated here.
Air line (approximately)
262 kilometers
142 nautical miles