Thank you. The EZE - ZRH will be my first booking due to IB releasing seats before Qantas( Syd - SCL). How do I make the EZE - ZRH online , with it being the 2nd sector on the Multi-city?
See this post: "oneworld" award (132.4K/249.6K/318K/455K) Planning - The Definitive Thread
In short you'd want to book a dummy flight in front of the EZE-ZRH (it can be AU-anything) so that the ticket currency is AUD otherwise you will encounter issues later. Ideally book an earlier date for the same routing that you are wanting. Eg. if you intend to fly SYD-SCL on QF, then book an earlier SYD-SCL dummy followed by the EZE-ZRH that you actually want.