The calculated distance (air line) between Mareno di Piave and Reggio nell'Emilia is approximately 115 miles respectively 185 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 Mareno di Piave and Reggio nell'Emilia has been calculated here.
Air line (approximately)
185 kilometers
100 nautical miles