The calculated distance (air line) between Veselí nad Lužnicí and Znojmo is approximately 65 miles respectively 105 kilometers.
By car or train, the actual journey to Znojmo is certainly longer, as only the direct route (as the crow flies) between Veselí nad Lužnicí and Znojmo has been calculated here.
Air line (approximately)
105 kilometers
57 nautical miles