The calculated distance (air line) between Šmarje pri Jelšah and Šentilj v Slov. Goricah is approximately 32 miles respectively 51 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 Šmarje pri Jelšah and Šentilj v Slov. Goricah has been calculated here.
Air line (approximately)
51 kilometers
28 nautical miles