The calculated distance (air line) between Qom and Khomeynī Shahr is approximately 140 miles respectively 226 kilometers.
By car or train, the actual journey to Khomeynī Shahr is certainly longer, as only the direct route (as the crow flies) between Qom and Khomeynī Shahr has been calculated here.
Air line (approximately)
226 kilometers
122 nautical miles