The calculated distance (air line) between Šluknov and Ústí nad Labem is approximately 30 miles respectively 48 kilometers.
By car or train, the actual journey to Ústí nad Labem is certainly longer, as only the direct route (as the crow flies) between Šluknov and Ústí nad Labem has been calculated here.
Air line (approximately)
48 kilometers
26 nautical miles