The calculated distance (air line) between Al Fāw and Janūb as Surrah is approximately 57 miles respectively 92 kilometers.
By car or train, the actual journey to Janūb as Surrah is certainly longer, as only the direct route (as the crow flies) between Al Fāw and Janūb as Surrah has been calculated here.
Air line (approximately)
92 kilometers
50 nautical miles