The calculated distance (air line) between Khorramabad and Darreh Shahr is approximately 61 miles respectively 98 kilometers.
By car or train, the actual journey to Darreh Shahr is certainly longer, as only the direct route (as the crow flies) between Khorramabad and Darreh Shahr has been calculated here.
Air line (approximately)
98 kilometers
53 nautical miles