A woman who flew from the US to Paris without a ticket caused another disturbance on her way back, CNN reported.
She managed to sneak onto Delta Air Lines flight 264 last Tuesday and avoid being detected until the journey was nearly over.
A Transportation Security Administration representative told Business Insider last week that an individual without a boarding pass completed a security screening and then bypassed two identity verification and boarding status stations.
JonNYC, a popular aviation insider on social media, reported she was believed to have been hiding in a restroom during takeoff.
Citing law enforcement sources, CNN reported the woman was supposed to be flown back to the US on Saturday but was removed from the flight before takeoff.
The woman had been kept in a waiting zone at Paris' Charles de Gaulle Airport because she did not meet the conditions for entering Europe, the outlet previously reported.
Gary Treichler, who sat across the aisle from the woman on Saturday's flight, told CNN, "She kept on saying 'I do not want to go back to the USA. Only a judge can make me go back to the USA."
"She also repeated the Geneva Convention a few times so to me that kind of showed that she was off," he added.
The stowaway is a woman between 55 and 60 years old and has a Russian passport, an airport official told CNN.
Her flight back to the US is yet to be rescheduled, the outlet reported.
"Nothing is of greater importance than matters of safety and security," a Delta spokesperson said in a statement shared with BI after the initial flight.
"That's why Delta is conducting an exhaustive investigation of what may have occurred and will work collaboratively with other aviation stakeholders and law enforcement to that end."