The calculated distance (air line) between Planá and Jablonec nad Nisou is approximately 122 miles respectively 197 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 Planá and Jablonec nad Nisou has been calculated here.
Air line (approximately)
197 kilometers
106 nautical miles