The calculated distance (air line) between Trezzo sull'Adda and Ponte San Pietro is approximately 8 miles respectively 13 kilometers.
By car or train, the actual journey to Ponte San Pietro is certainly longer, as only the direct route (as the crow flies) between Trezzo sull'Adda and Ponte San Pietro has been calculated here.
Air line (approximately)
13 kilometers
7 nautical miles