The calculated distance (air line) between Kaštel Sućurac and Samobor is approximately 160 miles respectively 257 kilometers.
By car or train, the actual journey to Samobor is certainly longer, as only the direct route (as the crow flies) between Kaštel Sućurac and Samobor has been calculated here.
Air line (approximately)
257 kilometers
139 nautical miles