1. 1Enter your booking number/ticket number and boarding date under the "check-in" menu on the homepage or mobile app.
2. 2Select the seat you want or change seats, and optionally enter your mileage number.
3. 3Enter accurate passport information and necessary travel documents (for international flights).
4. 4After completing check-in, your boarding pass is issued.
5. 5Print your home boarding pass, view it via SMS/Kakao link, or save it on the mobile boarding pass app.

Booking number or ticket number, boarding date, accurate passport information, and necessary travel documents (such as local address) for international flights.

You can select the seat you want or change seats during check-in. If all seats that can be reserved beforehand are already assigned, seats can be assigned at the airport. Free advance seat may be canceled if check-in is not completed 30 mins (domestic) or 70 mins (international) prior to departure.

Accurate passport information and necessary travel documents (local address, etc.) must be entered. If passport information is not entered accurately, check-in may be denied based on pre-screening results. For flights arriving in the U.S., you need to enter the address of the place you will stay at in the U.S. (hotel) or your permanent residency status.

Online check-in is available for group reservations, but the auto check-in service is not possible for group reservations.

1. 1'Check-in denied' - Ensure accurate passport information is entered for pre-screening.
2. 2'Seat changed' - Reserved seat may change due to airport status or aircraft changes.
3. 3'Free advance seat canceled' - Complete check-in 30 mins (domestic) or 70 mins (international) prior to departure to keep the seat.
4. 4'Mobile boarding pass not recognized' - Increase screen brightness.