05/26/2010 12:28 pm ET Updated May 25, 2011

Ginger McGuire: Sleeping Woman Left On Plane For Four Hours

PHILADELPHIA (AP) -- Airline officials are trying to figure out how a sleeping passenger was left aboard a flight for four hours after it landed in Philadelphia.

According to police and the Transportation Security Administration, the passenger didn't wake up when her United Express flight from Dulles airport outside Washington landed shortly after midnight Tuesday. At about 4 a.m., a cleaning crew found her.

United Airlines says they're working with a regional partner carrier to determine why the plane wasn't cleared upon landing.

Philadelphia's CBS 3 broke the story initially and gathered some of the background on this very unhappy traveler. Here's CBS 3:

Like a lot of travelers, Ginger McGuire, who works at a radio station and a local cable TV channel in suburban Detroit, tried to get some rest on her redeye United Airways Express flight from Washington D.C. The flight landed in Philadelphia just after midnight Tuesday morning...

A spokesperson for United Airlines released a statement to Eyewitness News that read: "We are working closely with our partner Trans States to investigate the cause and remedy the situation with the customer."