The calculated distance (air line) between Kaplice and Jablonec nad Nisou is approximately 140 miles respectively 226 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 Kaplice and Jablonec nad Nisou has been calculated here.
Air line (approximately)
226 kilometers
122 nautical miles