The calculated distance (air line) between Trogir and Kaštel Lukšić is approximately 7 miles respectively 10 kilometers.
By car or train, the actual journey to Kaštel Lukšić is certainly longer, as only the direct route (as the crow flies) between Trogir and Kaštel Lukšić has been calculated here.
Air line (approximately)
10 kilometers
6 nautical miles