Nineteen hours in the air, no stops, no economy cabin. Singapore Airlines flight SQ24 links New York JFK with Singapore Changi across roughly 9,537 miles (15,349 km), a title it has held since launching on 9 November 2020. Block times run between about 18.5 and 19 hours depending on direction and seasonal winds, and Singapore Airlines flies a near-identical sister route from Newark that's only around two miles shorter.
The aircraft doing the heavy lifting is the Airbus A350-900ULR, a variant built for exactly one customer. Singapore Airlines operates all seven in existence. Unlike other ultra-long-range jets, it has no extra physical fuel tank — Airbus instead reconfigured the fuel system to raise capacity from about 141,000 to 165,000 litres, stretching range to roughly 9,700 nautical miles. The route burns through about 85% of that certified range; the rest covers mandatory reserves and wind-related detours.
Those detours matter. Planes don't fly the straight great-circle line: dispatchers route into favourable jet stream tails eastbound and around punishing headwinds westbound, so the actual miles flown can differ day to day. Jet stream cores above 35,000 feet can top 200 knots, making the extra distance worth it.
The cabin tells its own story. There are just 161 seats — 67 business and 94 premium economy — roughly 92 fewer than a standard A350-900. Dropping economy does two jobs at once: it cuts tonnes of payload weight that can be traded for fuel, and it boosts revenue, since premium fares on a nonstop route with no competition outperform a fuller, cheaper cabin. Singapore Airlines judged that 19 hours in premium economy works; 19 hours in economy doesn't.
The record now has a countdown attached. In October 2027, Qantas plans to launch Sydney–London Heathrow nonstop under Project Sunrise — about 1,000 miles longer, approaching 20 hours in the air, on the A350-1000ULR. That jet takes a different engineering route, with a real 20,000-litre rear centre tank built into the fuselage. Qantas is keeping economy (140 seats of 238) and betting on a 'Wellbeing Zone' with stretch handles, guided movement screens and a hydration station to make 20 hours survivable at the back.
For travellers, the takeaway is simple: if you want to fly New York to Singapore without touching down, you'll pay premium prices for the privilege — but you'll also get a wide premium economy seat with a calf rest or a lie-flat bed, and you'll skip the hassle of a connection. It's a niche product, deliberately so, and it's about to be overtaken by something even longer.
