If your schedule suits, Cathay Pacific has announced special fares to Bangkok from the US:

$563++ from SFO or LAX
$613++ from JFK
Fare with taxes from JFK was about $686 on the sample trip I ran.

Valid for travel between 2/15 and 4/15/05. No min stay; max stay 30 days. $75 change fee; $200 cancellation fee.

Stopover permitted in Hong Kong; nonstop flights between JFK and HKG are available.

Not eligible to earn AAdvantage frequent flyer mileage credit nor Asia Miles credit.

Must purchase tickets by 1/31/05.

http://www.cathay-usa.com/specialfare/specials.asp