LHR-SYD is 10,573mi
EZE-LHR is 6,904mi
SYD-EZE is 7,326mi
The open jaw needs to be shorter than the flight segments, but it is longer. So this is invalid.
But otherwise, yes I believe you can use Joker, 2x 241, 2x GUF2 and fly 4x F for 2x J avios.
I was considering a one way redemption to SYD next year (availability permitting of course!) using 2x 241 vouchers for 4 J seats.
I presume that I can book, LHR-PVG//SIN-SYD? making our own way with a connecting flight PVG-SIN booked separately?
I also presume that this would be the same Avios as LHR-SYD, or with a break in the journey do they add the segments together these days?
Also have assumed this is a telephone booking due to the complexity!
Anyone clarify the above?
thanks
dj