The calculated distance (air line) between Gračanica and Mrkonjić Grad is approximately 64 miles respectively 102 kilometers.
By car or train, the actual journey to Mrkonjić Grad is certainly longer, as only the direct route (as the crow flies) between Gračanica and Mrkonjić Grad has been calculated here.
Air line (approximately)
102 kilometers
55 nautical miles