The calculated distance (air line) between Kolín and Jablonec nad Nisou is approximately 48 miles respectively 77 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 Kolín and Jablonec nad Nisou has been calculated here.
Air line (approximately)
77 kilometers
42 nautical miles