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MELBOURNE, AUSTRALIA - OCTOBER 31: A Qantas aeroplane takes off at Melbourne Airport on October 31, 2011 in Melbourne, Australia. Qantas flights are expected to return to the skies at 2:00pm today, after a decision by Fair Work Australia to terminate the industrial action that grounded the airline from Saturday. (Photo by Scott Barbour/Getty Images)

MELBOURNE, AUSTRALIA - OCTOBER 31:  A Qantas aeroplane takes off at Melbourne Airport on October 31, 2011 in Melbourne, Australia. Qantas flights are expected to return to the skies at 2:00pm today, after a decision by Fair Work Australia to terminate the industrial action that grounded the airline from Saturday.  (Photo by Scott Barbour/Getty Images)

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A Bombardier Inc. Q-400 QantasLink aircraft, regional carrier of Qantas Airways Ltd., approaches to land at Sydney Airport in Sydney, Australia, on Monday, Feb. 22, 2016. Qantas Airways is scheduled to announce half-year earnings on Feb. 23. Photographer: Brendon Thorne/Bloomberg via Getty Images

A Bombardier Inc. Q-400 QantasLink aircraft, regional carrier of Qantas Airways Ltd., approaches to land at Sydney Airport in Sydney, Australia, on Monday, Feb. 22, 2016. Qantas Airways is scheduled to announce half-year earnings on Feb. 23. Photographer: Brendon Thorne/Bloomberg via Getty Images

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Melbourne Tullamarine Airport, Terminal 4

Melbourne Tullamarine Airport, Terminal 4

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MELBOURNE, AUSTRALIA - JULY 14: Flightboard is seen at Melbourne International Airport showing Virgin Australia VA054 flight from Bali has been cancelled for today, on July 14, 2015 in Melbourne, Australia. Flights to and from Bali were disrupted due to a volcanic ash cloud following the eruption of Mount Raung in east Java. (Photo by Luis Ascui/Getty Images)

MELBOURNE, AUSTRALIA - JULY 14:  Flightboard is seen at Melbourne International Airport showing Virgin Australia VA054 flight from Bali has been cancelled for today, on July 14, 2015 in Melbourne, Australia. Flights to and from Bali were disrupted due to a volcanic ash cloud following the eruption of Mount Raung in east Java.  (Photo by Luis Ascui/Getty Images)

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Virgin Australia Holdings Ltd. aircraft stand at Sydney Airport in Sydney, Australia, on Thursday, Aug. 10, 2017. Virgin Australia said underlying performance for the first quarter of the 2018 financial year will improve from the year-earlier quarter. Photographer: Brendon Thorne/Bloomberg via Getty Images

Virgin Australia Holdings Ltd. aircraft stand at Sydney Airport in Sydney, Australia, on Thursday, Aug. 10, 2017. Virgin Australia said underlying performance for the first quarter of the 2018 financial year will improve from the year-earlier quarter. Photographer: Brendon Thorne/Bloomberg via Getty Images