The calculated distance (air line) between Castiglione delle Stiviere and Reggio nell'Emilia is approximately 48 miles respectively 78 kilometers.
By car or train, the actual journey to Reggio nell'Emilia is certainly longer, as only the direct route (as the crow flies) between Castiglione delle Stiviere and Reggio nell'Emilia has been calculated here.
Air line (approximately)
78 kilometers
42 nautical miles