I am planning a trip from slc to mnl, want to stop Japan on the way there. what is the best way to use my miles for these 2 airlines. I understand they have one way award tickets.

But BA do not fly in SLC.
AA i think would not allow stop over outside US.

I have both 150 thou miles on AA and BA - just going to use it with coach class kids are travelling with me.

Can you give me some suggestions?

thanks!