The calculated distance (air line) between Bosansko Grahovo and Mrkonjić Grad is approximately 39 miles respectively 63 kilometers.
By car or train, the actual journey to Mrkonjić Grad is certainly longer, as only the direct route (as the crow flies) between Bosansko Grahovo and Mrkonjić Grad has been calculated here.
Air line (approximately)
63 kilometers
34 nautical miles