The calculated distance (air line) between Zgornje Jezersko and Grosuplje is approximately 31 miles respectively 50 kilometers.
By car or train, the actual journey to Grosuplje is certainly longer, as only the direct route (as the crow flies) between Zgornje Jezersko and Grosuplje has been calculated here.
Air line (approximately)
50 kilometers
27 nautical miles