My parents and inlaws are coming from India to visit. I am wondering which airline FF program to choose for them so that I can use those miles in one way or the other.
3 people would be coming, so basically each would get 16000 miles,which is 48k in all.
They are not going to use those miles anyway, so I was wondering if any program would let me use those? I have NWA and hilton honors. Any thoughts????

What I was thinking was for eg. If they fly American then they can transfer those miles into hilton points at the rate of 5000miles = 10000 points for $25.
So if they have 15000 miles = 30000 points for $25 . So basically 90000 points for $75 which is a very good deal because I could stay in a 40000 points hotel for 2 nights which normally would atleast cost $250 per night.


Is there any other option like I just mentioned?