The calculated distance (air line) between Trzin and Šentilj v Slov. Goricah is approximately 64 miles respectively 103 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 Trzin and Šentilj v Slov. Goricah has been calculated here.
Air line (approximately)
103 kilometers
56 nautical miles