The calculated distance (air line) between Velike Lašče and Slovenj Gradec is approximately 51 miles respectively 83 kilometers.
By car or train, the actual journey to Slovenj Gradec is certainly longer, as only the direct route (as the crow flies) between Velike Lašče and Slovenj Gradec has been calculated here.
Air line (approximately)
83 kilometers
45 nautical miles