The calculated distance (air line) between Šmartno ob Paki and Sežana is approximately 70 miles respectively 113 kilometers.
By car or train, the actual journey to Sežana is certainly longer, as only the direct route (as the crow flies) between Šmartno ob Paki and Sežana has been calculated here.
Air line (approximately)
113 kilometers
61 nautical miles