The calculated distance (air line) between Ottendorf-Okrilla and Senftenberg is approximately 25 miles respectively 40 kilometers.
By car or train, the actual journey to Senftenberg is certainly longer, as only the direct route (as the crow flies) between Ottendorf-Okrilla and Senftenberg has been calculated here.
Air line (approximately)
40 kilometers
21 nautical miles