The calculated distance (air line) between Jablonec nad Nisou and Ústí nad Labem is approximately 50 miles respectively 81 kilometers.
By car or train, the actual journey to Ústí nad Labem is certainly longer, as only the direct route (as the crow flies) between Jablonec nad Nisou and Ústí nad Labem has been calculated here.
Air line (approximately)
81 kilometers
43 nautical miles