The calculated distance (air line) between Kostelec nad Orlicí and Karlovy Vary is approximately 148 miles respectively 238 kilometers.
By car or train, the actual journey to Karlovy Vary is certainly longer, as only the direct route (as the crow flies) between Kostelec nad Orlicí and Karlovy Vary has been calculated here.
Air line (approximately)
238 kilometers
129 nautical miles