Originally Posted by
cadaughertycarob
One more question, since you all have been so helpful. How would it be a problem if UA and CO merge? I'm curious since CO would be my first pick. Would points possibly be lost?
The airlines aren't merging, but will eventually be the same alliance (Star Alliance) -
if you went the route of having one account with each alliance, eventually you wouldn't have an account with a Sky Team airline (which includes DL and NW). No miles would be lost, but one would lose the flexibility to use Sky Team partners with elite status.