The calculated distance (air line) between Piove di Sacco-Piovega and Prato is approximately 108 miles respectively 174 kilometers.
By car or train, the actual journey to Prato is certainly longer, as only the direct route (as the crow flies) between Piove di Sacco-Piovega and Prato has been calculated here.
Air line (approximately)
174 kilometers
94 nautical miles