The calculated distance (air line) between Markaz-e Woluswalī-ye Āchīn and Bannu is approximately 79 miles respectively 127 kilometers.
By car or train, the actual journey to Bannu is certainly longer, as only the direct route (as the crow flies) between Markaz-e Woluswalī-ye Āchīn and Bannu has been calculated here.
Air line (approximately)
127 kilometers
69 nautical miles