The calculated distance (air line) between Khorramshahr and As Sālimīyah is approximately 77 miles respectively 124 kilometers.
By car or train, the actual journey to As Sālimīyah is certainly longer, as only the direct route (as the crow flies) between Khorramshahr and As Sālimīyah has been calculated here.
Air line (approximately)
124 kilometers
67 nautical miles