The calculated distance (air line) between Mandriola-Sant'Agostino and Mestre is approximately 21 miles respectively 34 kilometers.
By car or train, the actual journey to Mestre is certainly longer, as only the direct route (as the crow flies) between Mandriola-Sant'Agostino and Mestre has been calculated here.
Air line (approximately)
34 kilometers
18 nautical miles