The calculated distance (air line) between Kushk and Lashkar Gāh is approximately 184 miles respectively 296 kilometers.
By car or train, the actual journey to Lashkar Gāh is certainly longer, as only the direct route (as the crow flies) between Kushk and Lashkar Gāh has been calculated here.
Air line (approximately)
296 kilometers
159 nautical miles