The calculated distance (air line) between Tripoli and Qaşr al Qarabūllī is approximately 32 miles respectively 52 kilometers.
By car or train, the actual journey to Qaşr al Qarabūllī is certainly longer, as only the direct route (as the crow flies) between Tripoli and Qaşr al Qarabūllī has been calculated here.
Air line (approximately)
52 kilometers
28 nautical miles