The calculated distance (air line) between Al Başrah al Qadīmah and Khorramshahr is approximately 22 miles respectively 36 kilometers.
By car or train, the actual journey to Khorramshahr is certainly longer, as only the direct route (as the crow flies) between Al Başrah al Qadīmah and Khorramshahr has been calculated here.
Air line (approximately)
36 kilometers
19 nautical miles