The calculated distance (air line) between Semīrom and Khomeynī Shahr is approximately 88 miles respectively 141 kilometers.
By car or train, the actual journey to Khomeynī Shahr is certainly longer, as only the direct route (as the crow flies) between Semīrom and Khomeynī Shahr has been calculated here.
Air line (approximately)
141 kilometers
76 nautical miles