Chicago: A woman notorious for stowing away on commercial aeroplanes made it past two Transport Security Administration agents at O'Hare International Airport by hiding her face with her hair, and then stayed overnight at the airport before sneaking onto a plane and flying to London, prosecutors said Saturday.

Marilyn Hartman, 66, faces a felony theft charge in connection with flying to the United Kingdom on a British Airways jet without a $2400 ($A3000) ticket and a misdemeanour trespass charge in connection with getting into the airport illegally. At a hearing Saturday afternoon, a judge ordered her released on her own recognisance, but ordered her to undergo psychological treatment and stay away from O'Hare and any British Airways planes.

Marilyn Hartman has a history of sneaking aboard planes. Credit:AP

Hartman used her hair to hide her face and walk past two federal Transportation Security Administration agents who were checking documents at O'Hare last Sunday, prosecutors said Saturday. She then went to a terminal and tried to board a plane to Connecticut, but was stopped by a flight agent and told to sit down.

Hartman got on a shuttle bus to the international terminal and slept there overnight, prosecutors said.