More from Inside Edition: http://bit.ly/2bF0iuC Airlines charge parents an extra $300 to keep their children safe when they're flying alone, but just how protected are they? A 13-year-old girl who flew from Dallas to Portland by herself over the summer says she was sexually assaulted by a stranger sitting beside her. With as many as 400,000 children flying alone on any given weekend, Inside Edition conducted a demonstration to see how easy it can be for someone to approach an unaccompanied minor.