The calculated distance (air line) between Khomeynī Shahr and Omīdīyeh is approximately 171 miles respectively 275 kilometers.
By car or train, the actual journey to Omīdīyeh is certainly longer, as only the direct route (as the crow flies) between Khomeynī Shahr and Omīdīyeh has been calculated here.
Air line (approximately)
275 kilometers
149 nautical miles