The calculated distance (air line) between Ponte San Pietro and Calusco d'Adda is approximately 6 miles respectively 9 kilometers.
By car or train, the actual journey to Calusco d'Adda is certainly longer, as only the direct route (as the crow flies) between Ponte San Pietro and Calusco d'Adda has been calculated here.
Air line (approximately)
9 kilometers
5 nautical miles