The calculated distance (air line) between Sidi Bou Saïd and Ben Arous is approximately 10 miles respectively 17 kilometers.
By car or train, the actual journey to Ben Arous is certainly longer, as only the direct route (as the crow flies) between Sidi Bou Saïd and Ben Arous has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles