The calculated distance (air line) between Qalāt and Lashkar Gāh is approximately 153 miles respectively 246 kilometers.
By car or train, the actual journey to Lashkar Gāh is certainly longer, as only the direct route (as the crow flies) between Qalāt and Lashkar Gāh has been calculated here.
Air line (approximately)
246 kilometers
133 nautical miles