The calculated distance (air line) between Zaranj and Lashkar Gāh is approximately 155 miles respectively 249 kilometers.
By car or train, the actual journey to Lashkar Gāh is certainly longer, as only the direct route (as the crow flies) between Zaranj and Lashkar Gāh has been calculated here.
Air line (approximately)
249 kilometers
134 nautical miles