The calculated distance (air line) between Rogaška Slatina and Slovenj Gradec is approximately 33 miles respectively 53 kilometers.
By car or train, the actual journey to Slovenj Gradec is certainly longer, as only the direct route (as the crow flies) between Rogaška Slatina and Slovenj Gradec has been calculated here.
Air line (approximately)
53 kilometers
28 nautical miles