The calculated distance (air line) between Kostelec nad Orlicí and Jihlava is approximately 57 miles respectively 92 kilometers.
By car or train, the actual journey to Jihlava is certainly longer, as only the direct route (as the crow flies) between Kostelec nad Orlicí and Jihlava has been calculated here.
Air line (approximately)
92 kilometers
50 nautical miles