The calculated distance (air line) between Chlumec nad Cidlinou and Děčín is approximately 70 miles respectively 112 kilometers.
By car or train, the actual journey to Děčín is certainly longer, as only the direct route (as the crow flies) between Chlumec nad Cidlinou and Děčín has been calculated here.
Air line (approximately)
112 kilometers
61 nautical miles