The missing person was identified as Jibran Baloch.
She was supposed to come back to flight PK-782 in Toronto on February 29 to perform his duty.
However, he did not turn up to her work on the flight that was returning to Pakistan.
Jibran Baloch's disappearance became evident after staff members searched the room.
A PIA spokesperson told ARY News that the alleged disappearance of Jibran Baloch has been reported to the Toronto Police and the Border Security Force.
Not the first case
Earlier, a female air hostess named Maryam Raza went missing from her Canadian hotel recently.
After searching her hotel room, authorities found her uniform and a note with the message that read: "Thank you PIA."
Raza has been serving the PIA for the past 15 years.
She was assigned to the Islamabad to Toronto route.
Is PIA taking any measures to prevent further 'crew slip'?
According to reports, the Pakistani national carrier decided to deposit the passports of the crew on the Toronto flight to the authorities to avoid ‘crew slip’.
However, the measure has yielded no result so far.
About 12 air hostesses assigned to Toronto flights have slipped in the last few months, reported ARY News.