The calculated distance (air line) between Chlumec nad Cidlinou and Znojmo is approximately 94 miles respectively 151 kilometers.
By car or train, the actual journey to Znojmo is certainly longer, as only the direct route (as the crow flies) between Chlumec nad Cidlinou and Znojmo has been calculated here.
Air line (approximately)
151 kilometers
81 nautical miles