The calculated distance (air line) between Al Başrah al Qadīmah and Al Fāw is approximately 54 miles respectively 86 kilometers.
By car or train, the actual journey to Al Fāw is certainly longer, as only the direct route (as the crow flies) between Al Başrah al Qadīmah and Al Fāw has been calculated here.
Air line (approximately)
86 kilometers
47 nautical miles