For any questions or assistance call +1(888)-889-2015 OTA Alaska Airlines offers convenient check-in options: online and mobile check-in are available from 1 to 24 hours before departure. Passengers must check in at least 50 minutes prior to domestic flights and 60 minutes for international flights. Boarding gates close 30 minutes before departure. https://americanairtravel.com/alaska-airlines-check-in/