The calculated distance (air line) between Boltiere and Trezzo sull'Adda is approximately 3 miles respectively 5 kilometers.
By car or train, the actual journey to Trezzo sull'Adda is certainly longer, as only the direct route (as the crow flies) between Boltiere and Trezzo sull'Adda has been calculated here.
Air line (approximately)
5 kilometers
3 nautical miles