The calculated distance (air line) between Shūshtar and Darreh Shahr is approximately 114 miles respectively 184 kilometers.
By car or train, the actual journey to Darreh Shahr is certainly longer, as only the direct route (as the crow flies) between Shūshtar and Darreh Shahr has been calculated here.
Air line (approximately)
184 kilometers
99 nautical miles