The calculated distance (air line) between Šentilj v Slov. Goricah and Grosuplje is approximately 69 miles respectively 111 kilometers.
By car or train, the actual journey to Grosuplje is certainly longer, as only the direct route (as the crow flies) between Šentilj v Slov. Goricah and Grosuplje has been calculated here.
Air line (approximately)
111 kilometers
60 nautical miles