What is EarlyBird Check-In at Southwest? It's a convenient and time-saving feature designed to enhance your travel experience with Southwest Airlines. When you add EarlyBird Check-In to your reservation, the airline automatically checks you in 36 hours before your flight's departure, giving you a better boarding position compared to those who check in during the standard 24-hour window. This means you'll have earlier access to overhead bin space and a wider selection of seats, ensuring a smoother and more comfortable journey. Whether you're a frequent flyer or simply want to avoid the stress of last-minute check-ins, EarlyBird Check-In at Southwest is an excellent option to streamline your travel plans. While it does come with an additional fee, many travelers find the added convenience and peace of mind well worth the cost.