The calculated distance (air line) between Ústí nad Labem and Karlovy Vary is approximately 59 miles respectively 95 kilometers.
By car or train, the actual journey to Karlovy Vary is certainly longer, as only the direct route (as the crow flies) between Ústí nad Labem and Karlovy Vary has been calculated here.
Air line (approximately)
95 kilometers
51 nautical miles