Southwest EarlyBird Check-In is a convenient service offered by Southwest Airlines that allows passengers to secure an earlier boarding position automatically, enhancing their travel experience. By purchasing EarlyBird Check-In, travelers can enjoy the peace of mind of being automatically checked in 36 hours before their flight scheduled departure time, which is 12 hours earlier than the standard check-in window. This service increases the likelihood of obtaining a preferred boarding position, ensuring better access to overhead bin space and a wider selection of available seats.