The calculated distance (air line) between Znojmo and Ústí nad Labem is approximately 154 miles respectively 248 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 Znojmo and Ústí nad Labem has been calculated here.
Air line (approximately)
248 kilometers
134 nautical miles