The calculated distance (air line) between Brembate di Sopra and Grassobbio is approximately 8 miles respectively 13 kilometers.
By car or train, the actual journey to Grassobbio is certainly longer, as only the direct route (as the crow flies) between Brembate di Sopra and Grassobbio has been calculated here.
Air line (approximately)
13 kilometers
7 nautical miles