Southwest EarlyBird Check-In is a convenient service offered by Southwest Airlines that allows passengers to secure an earlier boarding position without having to check in manually. This optional service ensures that travelers are automatically checked in 36 hours before their flight's departure, giving them a better chance of boarding earlier and selecting their preferred seats. Unlike the standard check-in process, which begins 24 hours before departure, Southwest EarlyBird Check-In provides a significant advantage by granting passengers a higher boarding priority than those who check in later.