Originally Posted by
restlessinRNO
You probably want to fly LAX-BKK (various routings) and then BKK-USM. Only Thai (TG) and Bangkok Airways (PG) flies BKK-USM. Neither are in the OW alliance, but PG flights can be credited to CX (Cathay Pacific) now.
I omitted to mention that there is a twice a day HKG-USM flight on PG, but timing it with a LAX-HKG flight can be a challenge.