The calculated distance (air line) between Ottendorf-Okrilla and Heidenau is approximately 15 miles respectively 24 kilometers.
By car or train, the actual journey to Heidenau is certainly longer, as only the direct route (as the crow flies) between Ottendorf-Okrilla and Heidenau has been calculated here.
Air line (approximately)
24 kilometers
13 nautical miles