The calculated distance (air line) between Trofarello and Reggio nell'Emilia is approximately 143 miles respectively 230 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 Trofarello and Reggio nell'Emilia has been calculated here.
Air line (approximately)
230 kilometers
124 nautical miles