The calculated distance (air line) between Bani Walid and Az Zāwīyah is approximately 101 miles respectively 163 kilometers.
By car or train, the actual journey to Az Zāwīyah is certainly longer, as only the direct route (as the crow flies) between Bani Walid and Az Zāwīyah has been calculated here.
Air line (approximately)
163 kilometers
88 nautical miles