The calculated distance (air line) between Az Zarqā and Sīdī Sālim is approximately 50 miles respectively 81 kilometers.
By car or train, the actual journey to Sīdī Sālim is certainly longer, as only the direct route (as the crow flies) between Az Zarqā and Sīdī Sālim has been calculated here.
Air line (approximately)
81 kilometers
44 nautical miles