The calculated distance (air line) between Kobarid and Zagorje ob Savi is approximately 68 miles respectively 110 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 Kobarid and Zagorje ob Savi has been calculated here.
Air line (approximately)
110 kilometers
59 nautical miles