Originally Posted by
ioto1902
Nevertheless, if your have the will and the budget, just fly CMB-DXB in F as m3red has suggested.
The requirement is CMB-DXB-SEA rtn - CMB-DXB return in F is just 8.5k miles.
As already commented on I'm not sure i would try to fly extra to earn 40k miles - the only tangible benefits I can see are F lounge access in DXB and SYD/MEL over J lounge and a free Gold membership for somebody else. Both OK but not worth spending significant amounts to get IMHO.