Originally Posted by
SanDiego1K
I even redeemed for CX F from HKG-LAX, where the number of Avios was higher with BA but the fee was lower than with AA.
Huh? I pretty much commute between BOS and BKK, often using CX F awards with my AAdvantage miles. IIRC my last redemption had a USD $2.50 copay, or something like that. Sometimes it's as high as USD $65 roughly, but never more.