Southwest Airlines is well known among passengers for its services and amenities offered to them, and early bird check-in is one of those. This particular service automatically checks you in 36 hours before your flight’s departure, giving you an earlier boarding position. By purchasing Southwest Early Bird, you also increase your chances of getting a better seat choice and earlier access to overhead bin space. To learn more details about this, visit the official website of Southwest Airlines or read the blog at the above link.