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.

Delta Air Lines said it discovered a second passenger without a ticket this month, this one actually getting on a plane bound from Seattle to Hawaii, officials said.

A person who managed to board a Delta Air Lines flight from Seattle to Honolulu on Christmas Eve was arrested after being found before takeoff.