The calculated distance (air line) between Sevnica and Zagorje ob Savi is approximately 18 miles respectively 28 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 Sevnica and Zagorje ob Savi has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles