The calculated distance (air line) between As Saffānīyah and Al Fāw is approximately 139 miles respectively 224 kilometers.
By car or train, the actual journey to Al Fāw is certainly longer, as only the direct route (as the crow flies) between As Saffānīyah and Al Fāw has been calculated here.
Air line (approximately)
224 kilometers
121 nautical miles