The calculated distance (air line) between Úpice and Jablonec nad Nisou is approximately 40 miles respectively 64 kilometers.
By car or train, the actual journey to Jablonec nad Nisou is certainly longer, as only the direct route (as the crow flies) between Úpice and Jablonec nad Nisou has been calculated here.
Air line (approximately)
64 kilometers
35 nautical miles