The calculated distance (air line) between Kostanjevica na Krki and Domžale is approximately 45 miles respectively 72 kilometers.
By car or train, the actual journey to Domžale is certainly longer, as only the direct route (as the crow flies) between Kostanjevica na Krki and Domžale has been calculated here.
Air line (approximately)
72 kilometers
39 nautical miles