(Reuters)

Airbus completed a marathon test flight lasting more than 24 hours that triggered a surge in online tracking, when ​an A350 jet being developed for record-beating commercial flights touched down in France from Melbourne on Tuesday.

The test marks a key step in ⁠Qantas' Project Sunrise, which aims to launch the world's longest ​commercial passenger services and reshape long-haul travel by eliminating ​stopovers between ‌Australia and Europe.

The specially adapted ⁠A350-1000ULR ​airliner is due to debut with the Australian carrier's nonstop Sydney-London route from 2027. Airbus has been conducting a two-month test campaign on the aircraft since June.

Airbus said ‌the aircraft, which boasts a specially designed extra fuel ‌tank, remained in the air for 24 hours and 24 minutes, covering 23,075 km (14,338 miles) without stopping, before landing at ​the plane's factory in Toulouse, France.

Flight-tracking provider Flightradar24 said the trip was the second-most-tracked flight ever on its channels-behind a 2024 flight carrying Queen Elizabeth II's coffin-with more than 3.6 million people following its ‌progress northwards via Canada.

In 2005, ​a Boeing 777-200LR Worldliner flew 21,601.7 km (13,422 miles) from Hong Kong to London in 22 hours and 42 minutes.

Qantas has ordered 12 modified A350-1000ULR ​aircraft, designed to connect Australia's ‌east ⁠coast with ‌London and New York in about ‌20 hours.

The services aim to turn what was once a five-day journey on ⁠the "Kangaroo Route" to London into a single flight lasting ​19 to 21 hours, depending on routing and winds.

The first aircraft, which carries 20,000 litres of fuel and can seat 238 passengers, is due for delivery in April 2027.

Qantas expects to operate daily nonstop ​flights between Sydney and London from October 2027.