The calculated distance (air line) between Sidi Bou Saïd and Oued Lill is approximately 17 miles respectively 27 kilometers.
By car or train, the actual journey to Oued Lill is certainly longer, as only the direct route (as the crow flies) between Sidi Bou Saïd and Oued Lill has been calculated here.
Air line (approximately)
27 kilometers
15 nautical miles