The calculated distance (air line) between Susa and Reggio nell'Emilia is approximately 177 miles respectively 286 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 Susa and Reggio nell'Emilia has been calculated here.
Air line (approximately)
286 kilometers
154 nautical miles