The calculated distance (air line) between Khomeynī Shahr and Shūshtar is approximately 163 miles respectively 262 kilometers.
By car or train, the actual journey to Shūshtar is certainly longer, as only the direct route (as the crow flies) between Khomeynī Shahr and Shūshtar has been calculated here.
Air line (approximately)
262 kilometers
141 nautical miles