The calculated distance (air line) between Šmartno pri Litiji and Novo Mesto is approximately 23 miles respectively 37 kilometers.
By car or train, the actual journey to Novo Mesto is certainly longer, as only the direct route (as the crow flies) between Šmartno pri Litiji and Novo Mesto has been calculated here.
Air line (approximately)
37 kilometers
20 nautical miles