The calculated distance (air line) between Idkū and Sīdī Sālim is approximately 29 miles respectively 47 kilometers.
By car or train, the actual journey to Sīdī Sālim is certainly longer, as only the direct route (as the crow flies) between Idkū and Sīdī Sālim has been calculated here.
Air line (approximately)
47 kilometers
25 nautical miles