The calculated distance (air line) between Prevalje and Zagorje ob Savi is approximately 29 miles respectively 47 kilometers.
By car or train, the actual journey to Zagorje ob Savi is certainly longer, as only the direct route (as the crow flies) between Prevalje and Zagorje ob Savi has been calculated here.
Air line (approximately)
47 kilometers
25 nautical miles