The aircraft was met by paramedics.
“We are very grateful for their assistance,” the spokesperson told the website.
The woman's cause of death is yet to be determined.
A Qantas spokesperson has confirmed that a 34-year-old woman died on-board a flight from Los Angeles to Melbourne on Sunday.
The spokesperson told news.com.au that cabin crew were assisted by two doctors before the plane touched down shortly before 9am.
The aircraft was met by paramedics.
“We are very grateful for their assistance,” the spokesperson told the website.
The woman's cause of death is yet to be determined.