The calculated distance (air line) between Kaštel Sućurac and Vinkovci is approximately 168 miles respectively 270 kilometers.
By car or train, the actual journey to Vinkovci is certainly longer, as only the direct route (as the crow flies) between Kaštel Sućurac and Vinkovci has been calculated here.
Air line (approximately)
270 kilometers
146 nautical miles