The calculated distance (air line) between Jablonec nad Nisou and Znojmo is approximately 135 miles respectively 217 kilometers.
By car or train, the actual journey to Znojmo is certainly longer, as only the direct route (as the crow flies) between Jablonec nad Nisou and Znojmo has been calculated here.
Air line (approximately)
217 kilometers
117 nautical miles