Originally Posted by
drummer5829
I would likely go ORD - BKK - ORD.
I have read that with certain airlines (I know United for sure) you can fly, for example, ORD - BKK - ORD - SFO... and the last leg to SFO doesnt cost any extra miles
United does allow 1 stopover in a round trip flight. So you could do ORD-BKK(destination)-ORD// ORD-SFO.
Search for availability on ANA/UA for each segment separately and you should be able to go from there.