The calculated distance (air line) between Al Başrah al Qadīmah and Az Zubayr is approximately 10 miles respectively 16 kilometers.
By car or train, the actual journey to Az Zubayr is certainly longer, as only the direct route (as the crow flies) between Al Başrah al Qadīmah and Az Zubayr has been calculated here.
Air line (approximately)
16 kilometers
9 nautical miles