American Airlines has round-trip flights from Dallas (DFW) to Seoul (ICN) for $858-$863, NONSTOP. Flights February to April. Departures on Monday, Tuesday, Wednesday, Thursday, and Sunday. No Fridays or Saturdays. Extended weekends available.
A Carry-on bag and also a personal item is allowed for free on American. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.
Read More Nonstop Flights: Dallas to Seoul $858-$863 r/t [February-April] – American Airlines