The calculated distance (air line) between Český Krumlov and Ústí nad Labem is approximately 128 miles respectively 207 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 Český Krumlov and Ústí nad Labem has been calculated here.
Air line (approximately)
207 kilometers
112 nautical miles