I'm planning to fly out of RDU, to Edinburgh. I'd love to return from Edinburgh, but I'm not finding any rewards flights, so my trip is now open jaw, returning from London. (In Sept.)
I have points in AMEX, Chase, and Citi.
The best flights I've found are on United.
So I was trying to decide whether I should book through ANA or Avianca. ANA is more points, but very easy to transfer and book an open jaw. Avianca is cheaper points and money, but there are so many horror stories about transferring points to them that I'm a little worried. And I guess I'd have to do 2 one way tickets to get the open jaw.
I had just convinced myself to spend the extra points, when I noticed that ANA has a clause saying I can only book for immediate family. And my fiance is not, technically, my family.

So now my brain is too full, and I can't make a decision.
Can a more experienced person offer some advice?

Thanks,
JoAnne