Originally Posted by
RTWFF
I do it all the time, as I have *G status with United but the accrual is better with SQ when flying SQ. You raise an interesting question however - if you check-in under one FF program, is it possible to change the FF program on the booking oneself prior to boarding (I don't mean asking the airline staff)?
I can't think of any reason not to:
1. Enter the other *G number online
2. Check baggage in at a manned desk
3. Tell the check in agent to delete FFP no. and retro claim under whatever FFP one desires