when dl got panam, our panam mi accounts were xfered to a new dl # and were given a 5k mi new account bonus.....later, when we merged the accounts, dl took away the 5k...

iirc, my twa mi's were not automatically xfered into a new aa account....but, i ended up w/the twa mi's getting put on my aa account....

i don't remember anything about eastern mi's....perhaps they went to dl? i must have had some....perhaps eal went to dl & others before ff programs started? i used to go to mia frequently and did fly on eal...

we got an email about no activity on whomever the left coast al who merged w/usair recently which was ignored because we don't use usair and the mi's would have been from one trip......

anyway, an aquiring airline will try to get the ffers from the defunct al and i would expect that the mi's would be xfered to th e new program...

good luck...