KE was looking at an AUS-ICN route back in 2022 (right as Samsung made their announcement on the Taylor site). It did not materialize due to "limited immediate demand and timing challenges."
However, since Fab 1 is about to come online; Fab 2 is going through the entitlement process; several Korean supply companies having moved into the area to supplement Samsung since 2022; new, large contracts with Tesla, Apple, AMD, Nvidia, Qualcomm, and others fuel the potential of more Fabs (the site can accommodate 10 Fab facilities); etc... KE and Dl are revisiting this route.
The following is a good read:
https://aviationa2z.com/index.php/2026/03/18/korean-air-delta-eye-first-incheon-austin-flight/
There is some confident chatter that this route could start in 2027 or 2028.
Also look for a CDG route fairly soon (within the next 4 years). AUS official are pursuing this route as well.
Paris and Seoul are the #1 and #2 unserved international routes out of ABIA. Interestingly, both airports (CDG and ICN) are SkyTeam hubs. So, DL is heavily involved with both. It's not clear if these routes would be served by DL metal or international metal (AF and KE) - or some sort of combination.