The calculated distance (air line) between Ponte San Pietro and Trezzo sull'Adda is approximately 8 miles respectively 13 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 Ponte San Pietro and Trezzo sull'Adda has been calculated here.
Air line (approximately)
13 kilometers
7 nautical miles