The calculated distance (air line) between Kostelec nad Orlicí and Znojmo is approximately 88 miles respectively 141 kilometers.
By car or train, the actual journey to Znojmo is certainly longer, as only the direct route (as the crow flies) between Kostelec nad Orlicí and Znojmo has been calculated here.
Air line (approximately)
141 kilometers
76 nautical miles