The calculated distance (air line) between Bni Bouayach and Ksar El Kebir is approximately 117 miles respectively 188 kilometers.
By car or train, the actual journey to Ksar El Kebir is certainly longer, as only the direct route (as the crow flies) between Bni Bouayach and Ksar El Kebir has been calculated here.
Air line (approximately)
188 kilometers
102 nautical miles