Southwest Airlines is a great no-frills airline with service across the United States. Unfortunately, a big part of their “no frills” aspect is that seats are not assigned at all; once you’re onboard the aircraft, you can pick any seat you want that’s available. That also means that to get on the aircraft sooner, you want to check in as close to exactly 24 hours before your flight to get an A, B, or C number, which determines the order in which you board and is assigned sequentially upon check-in. Fortunately, for $12.50, Earlybird Check-in does all the work for you before anyone else has a chance to do the same.
