Originally Posted by
HKUSFLYER
For example if I belong to both CX and BA, if I take a CX flight, can I accredit miles to my BA program for accumulation to a higher tier?
Yes.
But if the CX flight been taken with your CX ff number in the reservation and therefore credited, it is very hard to get uncredited.
You cannot double dip. [There are sometimes FQTR FQTV technical exceptions]
Note many low cost CX flights do not credit to other ffp's [nil earning]
https://www.wheretocredit.com/cx