The calculated distance (air line) between Sannazzaro de' Burgondi and Monza is approximately 38 miles respectively 60 kilometers.
By car or train, the actual journey to Monza is certainly longer, as only the direct route (as the crow flies) between Sannazzaro de' Burgondi and Monza has been calculated here.
Air line (approximately)
60 kilometers
33 nautical miles