The calculated distance (air line) between Kaštel Sućurac and Đakovo is approximately 156 miles respectively 251 kilometers.
By car or train, the actual journey to Đakovo is certainly longer, as only the direct route (as the crow flies) between Kaštel Sućurac and Đakovo has been calculated here.
Air line (approximately)
251 kilometers
135 nautical miles