The calculated distance (air line) between Sv. Trojica v Slov. Goricah and Zagorje ob Savi is approximately 52 miles respectively 84 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 Sv. Trojica v Slov. Goricah and Zagorje ob Savi has been calculated here.
Air line (approximately)
84 kilometers
45 nautical miles