Australian airline Jetstar has been forced to apologize to a woman who complained a male flight attendant tried to befriend her 15-year-old daughter on Facebook hours after their plane landed.

The budget airline's spokesman Simon Westaway said it was conducting an internal investigation into the incident and management had been in touch with the Melbourne-based flight attendant, who is on a rostered day off.

The mother, known only as Elizabeth, and her 15 and 16-year-old daughters flew from the Sunshine Coast to Melbourne last month.

Elizabeth said her daughters did not give the attendant their names but the younger one received a friendship request, followed by messages asking why she hadn't added him as a Facebook friend.

They have since blocked the man from making any Facebook friend requests, but Elizabeth said she was worried especially during the school holidays that he had made other such requests and impressionable young girls had accepted them.

While it was originally believed the flight attendant accessed her daughter's details through the flight manifest, Westaway said he understood the girl's name had been obtained through a flight boarding pass.

"We need to get our employee's side of the story in regard to that," he said. "He's a good employee, he's been with the company for over two years."

Click here to read more on this story from News.com.au.