What is the longest non-stop commercial air route?

The world’s longest non-stop commercial air route is New York to Singapore, operated by Singapore Airlines between New York–JFK and Singapore Changi.

The route covers about 15,349 kilometres, or roughly 9,537 miles, and typically takes close to 19 hours, depending on winds and other operating conditions. Singapore Airlines operates it with the Airbus A350-900ULR, a specially configured ultra-long-range aircraft designed to carry enough fuel for the marathon journey.

The service returned in 2018 after an earlier version had been discontinued. Its aircraft uses a premium-heavy cabin layout, helping make the extreme distance workable while reducing passenger and cargo weight. Flight times differ by direction: westbound and eastbound journeys can vary because of prevailing winds.

“Longest flight” can mean distance, scheduled duration, or a one-off charter, so rankings may change. This answer refers to the longest regularly scheduled non-stop commercial passenger route currently operating.