The calculated distance (air line) between Sannazzaro de' Burgondi and Mestre is approximately 165 miles respectively 265 kilometers.
By car or train, the actual journey to Mestre is certainly longer, as only the direct route (as the crow flies) between Sannazzaro de' Burgondi and Mestre has been calculated here.
Air line (approximately)
265 kilometers
143 nautical miles