The calculated distance (air line) between Holice and Jablonec nad Nisou is approximately 58 miles respectively 93 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 Holice and Jablonec nad Nisou has been calculated here.
Air line (approximately)
93 kilometers
50 nautical miles