The calculated distance (air line) between Port Said and Sīdī Sālim is approximately 90 miles respectively 144 kilometers.
By car or train, the actual journey to Sīdī Sālim is certainly longer, as only the direct route (as the crow flies) between Port Said and Sīdī Sālim has been calculated here.
Air line (approximately)
144 kilometers
78 nautical miles