The calculated distance (air line) between Qaşr Lībiyā and Darnah is approximately 72 miles respectively 115 kilometers.
By car or train, the actual journey to Darnah is certainly longer, as only the direct route (as the crow flies) between Qaşr Lībiyā and Darnah has been calculated here.
Air line (approximately)
115 kilometers
62 nautical miles