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

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.

A stowaway was caught trying to nab a ride on a Delta Air Lines plane at Seattle-Tacoma International Airport on Christmas Eve. The Seattle attempt follows another recent incident on a Delta airplane, that one involving an unticketed passenger who made it ...