Korean Air has round-trip flights from New York (JFK) to Chiang Mai (CNX) for $928-$971 with a connection. Flights October, November, January, February, and March. 7-day minimum stay required. No Thanksgiving dates.
Some small OTAs on Skyscanner and Google have this for cheaper than the airline. If you plan on booking there, beware of any site that charges a fee to cancel a ticket within the 24-hour “free” period. Use unknown booking sites at your own risk.
