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