Understanding the Southwest Airlines check-in and boarding process is key to a smooth travel experience. Southwest offers multiple check-in options, including online, mobile, and airport kiosks, with check-in opening 24 hours before departure. Unlike traditional airlines, Southwest uses an open seating policy, assigning passengers a boarding group (A, B, or C) based on check-in time. ... https://www.airlinereservationwindow.com/southwest-airlines-check-in-and-boarding-process/