The calculated distance (air line) between Ostiglia and Reggio nell'Emilia is approximately 36 miles respectively 57 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 Ostiglia and Reggio nell'Emilia has been calculated here.
Air line (approximately)
57 kilometers
31 nautical miles