The calculated distance (air line) between Fagnano Olona-Bergoro and Prato is approximately 165 miles respectively 266 kilometers.
By car or train, the actual journey to Prato is certainly longer, as only the direct route (as the crow flies) between Fagnano Olona-Bergoro and Prato has been calculated here.
Air line (approximately)
266 kilometers
144 nautical miles