The calculated distance (air line) between Šekovići and Mrkonjić Grad is approximately 88 miles respectively 142 kilometers.
By car or train, the actual journey to Mrkonjić Grad is certainly longer, as only the direct route (as the crow flies) between Šekovići and Mrkonjić Grad has been calculated here.
Air line (approximately)
142 kilometers
76 nautical miles