The calculated distance (air line) between Ribat Al Khayr and Ksar El Kebir is approximately 118 miles respectively 190 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 Ribat Al Khayr and Ksar El Kebir has been calculated here.
Air line (approximately)
190 kilometers
103 nautical miles