Fly4Free is reporting amazing prices between several US cities and Bangkok — from $225 round trip (New York to Bangkok) on ANA. These prices are available in January, February, and March on select dates are not not shown via Google Flights. You will find these via small travel agencies listed on Momondo.com. Danny the Deal Guru at Miles to Memories reports that the cheapest prices are available on Monday–>Thursday trips.
These prices are extremely low — I would recommend holding off on making any nonrefundable plans around these fares in case ANA chooses not to honor them.
Other cities available (check Fly4Free for sample dates):
Los Angeles: $220
San Francisco: $225
These prices won’t last. Again, I’d hold off on making any other arrangements for at least a few days/weeks to be sure that ANA honors the fares. In recent months, ANA did honor the $600 RT business class to Australia tickets (though I’ve read reports of an equipment change on the route). This is a long trip for sure, but it’s a great price.