What is EarlyBird Check-In at Southwest? It’s a convenient add-on service offered by Southwest Airlines that enhances your travel experience by securing a better boarding position. EarlyBird Check-In automatically checks you in 36 hours before your flight’s departure, a full 12 hours earlier than general check-in. This increases your chances of boarding early, allowing you to choose your preferred seat and ensuring access to overhead bin space for your carry-on luggage. The service is available for a small fee and can be added during booking or at any time up to 36 hours before departure. For travelers seeking a stress-free and efficient boarding process, EarlyBird Check-In at Southwest is an excellent option to save time and enjoy a more comfortable flight experience.