Thai Airways no longer flies to Bangkok non-stop from Los Angeles, its only U.S. destination, but does provide service via Seoul and starting next year, via Osaka as well.
With the new flights just loaded into the schedule, Thai has made generous award space available on the new route. The flight runs three times per week and every day that I checked had two seats in business class, but note that Thai rarely releases more than two seats at a time in longhaul business. If you are traveling in a larger group, book two, then go back and see if Thai has released any more space–often you will find two more seats available.
Even without Singapore Airlines releasing space to Star Alliance partners in business or first class on their trans-pacific routes, fidning award space to Asia is not at all difficult when booking with a Star Alliance carrier. Asiana, United, ANA, and Air Canada tend to be generous in award allocation, particularly if you book almost a year in advance (which in many cases and on other award routings is meaingless).
What is nice about this new route is that Thai will put its 777-300ERs with great lie-flat business class seats on the route–a better altnerative to Asiana’s angled business class or Uniteds lie-flats, which provide limited privacy if you are traveling solo.
(tip of the hat to Canadian Kilometers)