The calculated distance (air line) between Žďár nad Sázavou and Znojmo is approximately 49 miles respectively 79 kilometers.
By car or train, the actual journey to Znojmo is certainly longer, as only the direct route (as the crow flies) between Žďár nad Sázavou and Znojmo has been calculated here.
Air line (approximately)
79 kilometers
43 nautical miles