The calculated distance (air line) between Frýdlant and Jablonec nad Nisou is approximately 14 miles respectively 23 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 Frýdlant and Jablonec nad Nisou has been calculated here.
Air line (approximately)
23 kilometers
12 nautical miles