[01/02/2016 @ 1:14 PM] Korean Air price increased to $711. Still available on JAL for $695 on Travelocity.
[01/06/2016 @ 7:32 PM] Korean Air fare is gone. AA+JAL seems to have issues pricing on most OTAs now. Removing from deal list until I can verify a booking.
American Airlines / Korean Air are offering round-trip flights from Dallas (DFW) to Ho Chi Minh (SGN) for $684 with a connection. Flights from March to April.