Delta has a discount economy fare Los Angeles to Bangkok, Thailand at $787 round trip (V booking code) with early May 2015 departure dates flying only Delta operated aircraft via Tokyo. Most dates are $100 to 200 more per ticket. There are several dates in the first two weeks of May 2015 with this low fare. The fare is $30 more at $817 during the last week of April.
This itinerary is bookable online at Delta.com for $786.30.
Delta lets you know this economy class itinerary can be upgraded to Business Class for $1,718.50 each way. That amount of cash will pay for some great hotel rooms in Bangkok.