The calculated distance (air line) between Chlumec nad Cidlinou and Jablonec nad Nisou is approximately 41 miles respectively 67 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 Chlumec nad Cidlinou and Jablonec nad Nisou has been calculated here.
Air line (approximately)
67 kilometers
36 nautical miles