The calculated distance (air line) between Čitluk and Mrkonjić Grad is approximately 88 miles respectively 141 kilometers.
By car or train, the actual journey to Mrkonjić Grad is certainly longer, as only the direct route (as the crow flies) between Čitluk and Mrkonjić Grad has been calculated here.
Air line (approximately)
141 kilometers
76 nautical miles