The calculated distance (air line) between Preddvor and Ravne na Koroškem is approximately 31 miles respectively 50 kilometers.
By car or train, the actual journey to Ravne na Koroškem is certainly longer, as only the direct route (as the crow flies) between Preddvor and Ravne na Koroškem has been calculated here.
Air line (approximately)
50 kilometers
27 nautical miles