Price as shown on AA Korean website. I don't have any experience booking ex-ICN, but from what I've read you may be asked to pay using a Korean cc.
Available on JL metal on TPAC segment and books in full F/J, so it earns 3x EQM's. Routing via DFW earns more miles although it will be on AA metal.
American Airlines Inc. (AA) F2E0Q5R1
https://goo.gl/flights/Axqw