The calculated distance (air line) between Horjul and Šentilj v Slov. Goricah is approximately 79 miles respectively 127 kilometers.
By car or train, the actual journey to Šentilj v Slov. Goricah is certainly longer, as only the direct route (as the crow flies) between Horjul and Šentilj v Slov. Goricah has been calculated here.
Air line (approximately)
127 kilometers
68 nautical miles