The calculated distance (air line) between Mislinja and Zagorje ob Savi is approximately 23 miles respectively 38 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 Mislinja and Zagorje ob Savi has been calculated here.
Air line (approximately)
38 kilometers
20 nautical miles