The calculated distance (air line) between Robāţ Karīm and Shahrīār is approximately 12 miles respectively 20 kilometers.
By car or train, the actual journey to Shahrīār is certainly longer, as only the direct route (as the crow flies) between Robāţ Karīm and Shahrīār has been calculated here.
Air line (approximately)
20 kilometers
11 nautical miles