The calculated distance (air line) between Podstrana and Kaštel Lukšić is approximately 10 miles respectively 17 kilometers.
By car or train, the actual journey to Kaštel Lukšić is certainly longer, as only the direct route (as the crow flies) between Podstrana and Kaštel Lukšić has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles