IIRC any travel via Sth America means you have to purchase the xCIRC29SA fare. That solves the <26k miles problem.
Cheers og
Finally found some info... it I have 29k to toy with, will want to maximize the trip some how!
For –CIR22 and –CIR26 Fares
Travel must be via the North/Central Pacific in one direction and the South West Pacific in the other direction or vice versa. Only one North/Central Pacific crossing and one South West Pacific crossing is permitted. Travel originating in or including South America is not permitted.
For –CIR29SA Fares
Travel must Originate in or include South America. Travel must be via the North/Central Pacific in one direction and via Chile/Argentina to/from the South West Pacific using the services of QF/LA in the other direction.