I went on the United site, and using the award travel feature and their flexible dates option, I found I can fly out to BKK on China Air for 70,000 miles and 20 bucks, first class sfo to peking, then business class peking to bkk.
Return I can only find coach flights, best deal for 32,500 miles and 57 bucks...
This is doing 21 days starting in Sept...
First time trying to use miles, would love some feedback, and also how is China Air First and Business Class?