The calculated distance (air line) between Horní Slavkov and Ústí nad Labem is approximately 65 miles respectively 104 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 Horní Slavkov and Ústí nad Labem has been calculated here.
Air line (approximately)
104 kilometers
56 nautical miles