The calculated distance (air line) between Oplotnica and Zagorje ob Savi is approximately 28 miles respectively 45 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 Oplotnica and Zagorje ob Savi has been calculated here.
Air line (approximately)
45 kilometers
24 nautical miles