A judge found Alicia Elizabeth Lander guilty of committing an indecent act in public, causing a disturbance, assaulting a police officer and mischief to property. She had pleaded not guilty to all four charges.
She is due back in court July 14 to be sentenced.
Lander and Jason George Chase, 39, who are both from the Halifax area, participated in an indecent act aboard the plane on Jan. 24, 2014.
Chase pleaded guilty in January of this year to committing an indecent act in a public place. He is scheduled to return at a later date for sentencing. He is asking for a conditional discharge.
Lander's trial began with some graphic testimony earlier this year.
Air Canada flight service director John Dunn testified the woman asked if she could sit next to her friend at the start of the flight.
Dunn said another passenger warned flight attendants to watch the pair because they had indicated they wanted to become members of the "mile high club."
He said he found the woman with her pants pulled down and the man's hand in her lap. He said the man was penetrating her. Dunn said he told the woman it was inappropriate and ordered her to get dressed.
The incident was reported to the captain, who arranged to have police meet the plane.
Another Air Canada employee testified Lander was belligerent the night of the incident as police tried to question her at Halifax Stanfield International Airport once the flight landed.
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