The calculated distance (air line) between Sīdī Bin Zīnah and Tripoli is approximately 70 miles respectively 112 kilometers.
By car or train, the actual journey to Tripoli is certainly longer, as only the direct route (as the crow flies) between Sīdī Bin Zīnah and Tripoli has been calculated here.
Air line (approximately)
112 kilometers
60 nautical miles