Age matters a lot when a minor travels alone on Southwest, and the reason is their safety and security. Therefore, Southwest Airlines Unaccompanied Minor Age to travel independently should be 5-11 years old. In addition to this, they are required to use unaccompanied minor services. Other than that, children aged 12 and above do not need to take this program, but they can still get assistance from the airline by paying charges if they require it.