Singapore Airlines operates the world's longest nonstop commercial flights between Singapore and New York, using specially built ultra-long-range A350-900ULR aircraft. These flights are designed for business customers and others willing to pay a premium for faster travel, hence the absence of economy class seating.
The airline's strategy focuses on a smaller business market, similar to supersonic aircraft like Concorde and Boom's Overture. However, this approach is not universal. For instance, Qantas plans ultra-long-haul flights to New York and London with different configurations.
Singapore Airlines is currently the only operator of the A350-900ULR variant, with seven in service. These aircraft can fly over 20 hours nonstop and are used for routes to New York-JFK and Newark Liberty airports. The standard A350-900 has a range of up to 8,500 nautical miles, while the ULR extends this to 9,700 nautical miles due to a modified fuel system.