The calculated distance (air line) between Fayrōz Kōh and Herāt is approximately 174 miles respectively 280 kilometers.
By car or train, the actual journey to Herāt is certainly longer, as only the direct route (as the crow flies) between Fayrōz Kōh and Herāt has been calculated here.
Air line (approximately)
280 kilometers
151 nautical miles