The calculated distance (air line) between Pećigrad and Mrkonjić Grad is approximately 73 miles respectively 117 kilometers.
By car or train, the actual journey to Mrkonjić Grad is certainly longer, as only the direct route (as the crow flies) between Pećigrad and Mrkonjić Grad has been calculated here.
Air line (approximately)
117 kilometers
63 nautical miles