Originally Posted by
headinclouds
Can one use QF miles to upgrade a QF metal flight if the a xONEx ticket was issued by AA? ...
Absolutely!
My wife and I together on QF with Business class upgrades SYD-JFK and NRT-SYD on a LONE4 ticketed by AA (001-) last year.
We also flew in F on 2 class domestiv AA flights with the same booking using AAdvantage miles..
Unlike BA and AA, it does not matter what airline 'plated' the ticket for QF segments.