DL: JFK-BKK $677 RT sparse dates in Jan./Feb. 7-day min.
 

Fare basis code VLE07PMI, 7-day min., looks sparse but some days available (try 1/18 depart on Google Flights). Thru NRT. If you're looking for CPM it's probably around 3.5, but of course DL has become much less rewarding with RDMs for many of us.

Base fares are only $83 each way with the pile of fees and a YR around $400.

Feb. 6 is the Chinese New Year. A few years ago I was there for it. the secret is it is easier to get around because folks head to the hills or whatever.