A 14-year-old, under the care of United Airlines, boarded the wrong international flight.
The passenger described the trip as a "once-in-a-lifetime experience"
"It was so mortifying," she told Yahoo UK.
She was wearing a crop top and baggy trousers.
"You did not let up with your mutters of annoyance and looks over your shoulder. I apologized to everyone around me. I almost started crying myself," she wrote in a post on Facebook.