The calculated distance (air line) between Šmartno pri Litiji and Slovenj Gradec is approximately 34 miles respectively 55 kilometers.
By car or train, the actual journey to Slovenj Gradec is certainly longer, as only the direct route (as the crow flies) between Šmartno pri Litiji and Slovenj Gradec has been calculated here.
Air line (approximately)
55 kilometers
30 nautical miles