Originally Posted by nako
The easy answer is to not buy them. When you buy your ticket, you have two choices when you buy - the regular version (on QF, with QF flight numbers) and the codeshared version (shows up as "American Airlines operated by Qantas Airways") - AA flight number on QF metal.
Depending on the fare code of the QF ticket, you may actually be better off not avoiding the codeshare, because many QF fares earn partial miles on AA. The corresponding AA codeshare - even on the same QF flight - will earn as if it was an AA flight in the first place.
Mike
You will often pay a fair premium to have an AA flight number on a QF flight on ex-USA tickets, so may need to decide how desperately full mileage accrual is wanted
Also be aware that some QF fares earn ZERO AA miles
e.g. for June from CLE-SYD
QFAU38 QF Q Round-Trip 1218.00 (USD)
NLRT QF N Round-Trip 1318.00 (USD)
VLRT QF V Round-Trip 1418.00 (USD)
RLRT QF R Round-Trip 1558.00 (USD)
VLRT AA V Round-Trip 1568.00 (USD)
LLRT AA L Round-Trip 1708.00 (USD)
MLRT QF M Round-Trip 1758.00 (USD)
The Q and N QF fares are non mileage accruing ( to AA ) , so the cheapest full mileage earning fare is the AA $1568 fare vs the QF $1218 fare . Need to decude whether either $200 is worth paying for 50% miles or $350 is worth paying for 100% miles
Dave