The calculated distance (air line) between Fagnano Olona-Bergoro and Mestre is approximately 164 miles respectively 264 kilometers.
By car or train, the actual journey to Mestre is certainly longer, as only the direct route (as the crow flies) between Fagnano Olona-Bergoro and Mestre has been calculated here.
Air line (approximately)
264 kilometers
143 nautical miles