The calculated distance (air line) between Farah and Lashkar Gāh is approximately 143 miles respectively 230 kilometers.
By car or train, the actual journey to Lashkar Gāh is certainly longer, as only the direct route (as the crow flies) between Farah and Lashkar Gāh has been calculated here.
Air line (approximately)
230 kilometers
124 nautical miles