The calculated distance (air line) between Qaşr Lībiyā and Ajdabiya is approximately 147 miles respectively 237 kilometers.
By car or train, the actual journey to Ajdabiya is certainly longer, as only the direct route (as the crow flies) between Qaşr Lībiyā and Ajdabiya has been calculated here.
Air line (approximately)
237 kilometers
128 nautical miles