The calculated distance (air line) between Gornji Vakuf and Banja Luka is approximately 61 miles respectively 99 kilometers.
By car or train, the actual journey to Banja Luka is certainly longer, as only the direct route (as the crow flies) between Gornji Vakuf and Banja Luka has been calculated here.
Air line (approximately)
99 kilometers
53 nautical miles