The person, who boarded the flight without a ticket, was detected as the plane was preparing to take off for Hawaii on Christmas Eve.

SEATTLE — Hours before she boarded a flight to Honolulu without a ticket on Christmas Eve, the woman who has become known as the “ Delta stowaway ” walked through Seattle-Tacoma International Airport barefoot with a bottle of alcohol and got in line to board at least two other flights.

After Delta Air Lines said a person was able to board a flight in Seattle without a ticket, a source with knowledge of the situation tells NBC News that the passenger was able to bypass security I.D.