The calculated distance (air line) between Omīdīyeh and Khorramshahr is approximately 93 miles respectively 150 kilometers.
By car or train, the actual journey to Khorramshahr is certainly longer, as only the direct route (as the crow flies) between Omīdīyeh and Khorramshahr has been calculated here.
Air line (approximately)
150 kilometers
81 nautical miles