1-844-414-9223 Korean Air's Seat Upgrade Policy is designed to be accessible and user-friendly. Passengers have multiple avenues to explore when seeking an upgrade, including the airline's official website, mobile app and in-person assistance from airport staff. If you have any questions or need assistance with the upgrade process, Korean Air's customer service team is ready to help. You can contact them through the airline's website, over the phone, or at the airport.