The calculated distance (air line) between Kaštel Sućurac and Šibenik is approximately 29 miles respectively 47 kilometers.
By car or train, the actual journey to Šibenik is certainly longer, as only the direct route (as the crow flies) between Kaštel Sućurac and Šibenik has been calculated here.
Air line (approximately)
47 kilometers
26 nautical miles