The calculated distance (air line) between Kostanjevica na Krki and Logatec is approximately 58 miles respectively 93 kilometers.
By car or train, the actual journey to Logatec is certainly longer, as only the direct route (as the crow flies) between Kostanjevica na Krki and Logatec has been calculated here.
Air line (approximately)
93 kilometers
50 nautical miles