The world's longest flight connects America to Asia, with travellers spending nearly 19 hours in the air. Singapore Airlines currently holds the record for the lengthiest long-haul journey, operating between New York's JFK Airport and Singapore Changi.

Covering a staggering 9,537 miles, the marathon trip takes 18 hours and 50 minutes and has been running since the airline launched it in 2018. Singapore Airlines deploys its latest Airbus A350-900ULR on the route, an aircraft capable of remaining airborne for more than 20 hours without refuelling.

The plane achieves these extraordinary flight times thanks to an enhanced fuel system, which increases the aircraft's total fuel capacity to a remarkable 24,000 litres.

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That said, the journey isn't available to everyone, as Singapore Airlines has ditched economy class on this particular route. Instead, the airline offers 67 Business Class seats and 94 Premium Economy Class seats.

Premium Economy travellers can enjoy the benefits of extra legroom, a footrest, and an adjustable headrest. They also have access to noise-cancelling headphones and WiFi for the duration of their flight, reports the Express.

Those in Business class get maximum privacy, with their seats converting into fully flat beds for a proper kip whilst travelling.

The aircraft features a host of luxury amenities including higher ceilings, larger windows and bespoke lighting engineered to reduce jetlag. The carrier claims that the plane's cutting-edge carbon composite airframe also allows for superior air quality.

Anyone hoping to secure a seat will need deep pockets, with tickets routinely costing well into five figures. Singapore Airlines' Chief Executive, Mr Goh Choon Phong, has previously described the new route as the "fastest way" to journey between the two metropolitan hubs.

He said: "Singapore Airlines has always taken pride in pushing the boundaries to provide the best possible travel convenience for our customers, and we are pleased to be leading the way with these new non-stop flights using the latest technology, ultra-long-range Airbus A350-900ULR.

"The flights will offer our customers the fastest way to travel between the two cities - in great comfort, together with Singapore Airlines' legendary service - and will help boost connectivity to and through the Singapore hub."

Singapore Airlines' aircraft is undoubtedly impressive, but the world's largest plane remains the Antonov An-225 Mriya, which can transport "52 mature elephants".