The calculated distance (air line) between Kaštel Kambelovac and Dubrovnik is approximately 107 miles respectively 173 kilometers.
By car or train, the actual journey to Dubrovnik is certainly longer, as only the direct route (as the crow flies) between Kaštel Kambelovac and Dubrovnik has been calculated here.
Air line (approximately)
173 kilometers
93 nautical miles