CHICAGO — A woman dubbed a ‘‘serial stowaway’’ for repeatedly trying to sneak onto commercial jets without a ticket has been ruled unfit for trial, a judge ruled Thursday.

Cook County Judge Maura Slattery Boyle ordered Marilyn Hartman, 66, to be sent to a secured mental health facility in Elgin, near Chicago. The ruling comes after psychologists for the defense and prosecution recommended Hartman undergo mental health treatment.

Hartman has been nabbed in and near airports dozens of times and made it onto planes six times. She recently made it into the air on a flight from Chicago to London and was subsequently charged with felony criminal trespass and felony burglary.

Portions of Hartman’s mental evaluations read aloud in court Thursday included a long list of her mental health problems. Psychologist Christopher Cooper described Hartman as an ‘‘intelligent woman’’ and said she understands the charges against her. But, he said, Hartman suffers from major depression, delusions she is being persecuted, and a ‘‘preoccupation with media attention.’’

Prosecutors said Hartman tried to walk out of an interview room when she was left unattended during an evaluation.

associated press