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Qantas has revealed plans for the world's longest-duration commercial flight by the end of 2025, ferrying passengers between Sydney and London on Airbus A350s in just over 19 hours.
Only a handful of airlines fly non-stop over such vast distances, feats that present a host of challenges, including the capability of planes, commercial viability and even the health of crew and passengers.
Here are some of the longest-duration flights in the world today:
Singapore to New York – 18 hrs 40 min
Singapore Airlines Flight SQ24 to New York's John F Kennedy International airport is currently the longest commercial journey in the world, taking passengers more than 15,000 kilometres from the city-state to the eastern United States on Airbus A350-900s.
It also operates the second-longest journey – Flight SQ22, also on A350-900s, to Newark in the US state of New Jersey, which is scheduled at 18 hours and 25 minutes.
Qantas will use the A350-1000 variant for its planned Sydney-London flights.
Darwin to London – 17 hrs 55 min
The longest current Qantas route – QF9 – connects Darwin in northern Australia with London daily, with passengers covering almost 14,000km on Boeing 787 Dreamliners.
Its flights were originally operated between London and Perth, but were moved to Darwin because of Australia's COVID-19 travel restrictions.
Qantas has said it will resume its Perth-to-London route this year.
Los Angeles to Singapore – more than 17 hrs
Singapore Airlines Flight SQ35 takes passengers more than 14,000km over the Pacific Ocean, from Los Angeles on the US West Coast to the Asian city-state in 17 hours and 10 minutes.
The carrier's San Francisco-Singapore flight is scheduled at 16 hours and 40 minutes.
New York to Hong Kong in 16-17 hrs?
Cathay Pacific said in March that it was planning to alter its New York-to-Hong Kong route over the Atlantic instead of over the Pacific Ocean, making it a longer journey than Singapore Airlines Flight SQ24 to JFK.
The flight path will cover "just under 9,000 nautical miles" (16,668km) in 16 to 17 hours, the airline told AFP in a statement.
It declined to be drawn on why its flight path gave a wide berth to Russia's airspace, which it has previously flown through, according to Bloomberg.
Many airlines have cancelled routes to Russian cities or are avoiding Russian airspace over Moscow's invasion of Ukraine.
Cathay Pacific said the decision was taken because "strong seasonal tailwinds" made the new route more favourable.
AFP