VH-OEI (cn 32913) from Buenos Aires, Ezeiza (EZE) in Argentina to Sydney, Kingsford Smith (SYD) in Australia, is a long way, and at times of head winds, it becomes necessary for this flight to call into either Auckland ( AKL ) or Christchurch ( CHC ) to top up on fuel for the final 3 hour leg to Sydney (SYD ).