Either this:

SU 103 Y JFKSVO HS2 1910 #1215
SU 330 Y SVOULN HS2 2000 #0610

or this:

KE 86 Y JFKICN HS1 0050 #0400
KE 867 Y ICNULN HS1 1955 2230

The SU option takes 10hrs less than the KE solution.
Also consider that KE have fierce black out periods for award tickets.

Or even this, if you prefer flying DL over the ocean:

DL 30 Y JFKSVO HS1 1610 #0955
SU 330 Y SVOULN HS1 2000 #0610