The calculated distance (air line) between Štětí 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 Štětí and Jablonec nad Nisou has been calculated here.
Air line (approximately)
64 kilometers
34 nautical miles