The calculated distance (air line) between Trezzano sul Naviglio and Reggio nell'Emilia is approximately 91 miles respectively 147 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 Trezzano sul Naviglio and Reggio nell'Emilia has been calculated here.
Air line (approximately)
147 kilometers
79 nautical miles