The calculated distance (air line) between Marcon-Gaggio-Colmello and Monza is approximately 146 miles respectively 236 kilometers.
By car or train, the actual journey to Monza is certainly longer, as only the direct route (as the crow flies) between Marcon-Gaggio-Colmello and Monza has been calculated here.
Air line (approximately)
236 kilometers
127 nautical miles