Speaking to ITV News Yashika Bageerathi said she was all alone and did not know what she was going to do without her family and friends.
Speaking to her mother as she boarded she said she was scared about landing in the country she fled in 2011.
Speaking to ITV News Yashika Bageerathi appealed directly to the Immigration Minister and the Home Secretary to remain in the UK.
Hundreds of people have been tweeting and calling Air Mauritius airlines to ask them to refuse to carry 19-year-old student Yashika Bageerathi, due to be deported back to Mauritius later tonight.
.@airmauritius Please don't deport Yashika Bageerathi -you'll be separating her from family, putting her in danger &disrupting her education
Yashika Bageerathi's MP David Burrowes said the Home Office was in contact with the British Council and they said it was possible for the A-level student facing deportation tonight to complete her studies in Mauritius. Condemning the decision to deport the top pupil ahead of her exams he said:
Yashika needs to be able to finish with the support of her family and friends. The Home Office has ignored their own policy.
As her headteacher said 80% are over 18 when they take A-levels.
The guidelines apply to people taking A-levels.
Mr Burrowes said the options to stop the deportation were limited unless her lawyers got a last-minute injunction to stop it. He said the actions of the Home Office were "far from compassionate" and that it was "compelling she should stay".
Mauritian student Yashika Bageerathi is "very distressed and worried" after learning that she will be deported tonight, a spokesman for her school said.
The 19-year-old is being taken from Yarl's Wood Immigration Removal Centre in Bedfordshire to Heathrow airport for an Air Mauritius flight at 9pm.
A spokesman for Oasis Academy Hadley in Enfield, north London, said: "She is on her way in the van but I really hope we can keep her here.
"We're encouraging everyone to tweet Air Mauritius and to phone them to stop this."
Mauritian student Yashika Bageerathi, 19, is being driven to Heathrow and will be deported tonight, according to a spokesman for the Oasis Academy Hadley in north London where she has been studying.
British Airways have refused to fly Yashika Bageerathi to Mauritius, the home affairs select committee heard today.
The A-level student is currently inside Yarl's Wood Removal Centre awaiting deportation, despite the campaign to enable her to stay to complete her exams.
The mother of Mauritian student Yashika Bageerathi, currently awaiting deportation inside Yarl's Wood Immigration Removal Centre, made a tearful appeal for authorities to release her daughter.
Speaking to UK Editor Lucy Manning Mrs Bageerathi said her daughter was scared and lonely inside the centre, and said it was "no place for her", as she did not deserve to be locked up "like a criminal".
Immigration Minister James Brokenshire insisted today that Yashika Bageerathi should be deported, as he appeared before the Commons Home Affairs select committee.
Her mother and headteacher appeared before the committee to appeal on her behalf to remain in the UK until she finishes her A-levels.
Speaking to Lucy Manning Yashika appealed directly to Mr Brokenshire to allow her to stay.
It is not clear whether he has heard her appeal, though he told MPs earlier today he would listen.
A Mauritian student facing deportation during her A-level exams has appealed to the Home Secretary Theresa May to personally intervene to enable her to stay to complete her studies.
Speaking to UK Editor Lucy Manning, she said Mrs May could let her stay "if she really wanted to".
Detained student Yashika Bageerathi, who is facing deportation to Mauritius along with her family, has appealed to stay in the UK to finish her exams.
Yashika, who attended Oasis Academy Hadley in Enfield, north London, is a "fantastic student" who has been accepted to several universities, her school said.
Speaking from inside Yarl's Wood, Yashika said she knew how hard she had been working for her A-Levels, and just wanted to do her exams.