The calculated distance (air line) between Crikvenica and Slavonski Brod is approximately 162 miles respectively 260 kilometers.
By car or train, the actual journey to Slavonski Brod is certainly longer, as only the direct route (as the crow flies) between Crikvenica and Slavonski Brod has been calculated here.
Air line (approximately)
260 kilometers
141 nautical miles