The calculated distance (air line) between Eslāmshahr and Dāmghān is approximately 179 miles respectively 288 kilometers.
By car or train, the actual journey to Dāmghān is certainly longer, as only the direct route (as the crow flies) between Eslāmshahr and Dāmghān has been calculated here.
Air line (approximately)
288 kilometers
156 nautical miles