Delta Air Lines is investigating how an unticketed passenger boarded a flight from Seattle to Honolulu on Christmas Eve — it's the airline's second stowaway incident in less than a month.

Delta employees noticed Small and asked ... Security Administration and the Port of Seattle confirmed the incident to CNN. Stowaway situations don’t happen often, but each represents a lapse ...

A second stowaway incident involving Delta Air Lines in as many months raises concerns over airport safety during the busiest travel period of the year. An unticketed passenger was discovered ...