The calculated distance (air line) between Sezimovo Ústí and Děčín is approximately 99 miles respectively 159 kilometers.
By car or train, the actual journey to Děčín is certainly longer, as only the direct route (as the crow flies) between Sezimovo Ústí and Děčín has been calculated here.
Air line (approximately)
159 kilometers
86 nautical miles