The calculated distance (air line) between Laktaši and Mrkonjić Grad is approximately 36 miles respectively 57 kilometers.
By car or train, the actual journey to Mrkonjić Grad is certainly longer, as only the direct route (as the crow flies) between Laktaši and Mrkonjić Grad has been calculated here.
Air line (approximately)
57 kilometers
31 nautical miles