The calculated distance (air line) between Qaşr al Qarabūllī and Zliten is approximately 53 miles respectively 86 kilometers.
By car or train, the actual journey to Zliten is certainly longer, as only the direct route (as the crow flies) between Qaşr al Qarabūllī and Zliten has been calculated here.
Air line (approximately)
86 kilometers
46 nautical miles