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Singapore Airlines JFK to Singapore — among the world's longest commercial flights.
Singapore Airlines SQ23 flies the ultra-long-haul corridor from New York to Singapore. Conditions change hour to hour — view the live forecast for your departure date.
View live forecastThe route crosses mid-latitudes where the polar jet can influence flight conditions, though exposure is shorter than on genuine long-haul crossings. A large portion of the flight crosses open ocean (North Atlantic), where upper-level conditions are generally smoother than over continental terrain.
Calmest season: May–September. The North Atlantic track sees its strongest jet-stream activity from November through February, when winds commonly exceed 150 kt and clear-air turbulence is more frequent.
Full JFK to SIN route guideSingapore Airlines SQ23 operates between JFK and SIN. Whether it’s bumpy depends on the day’s weather — Turbcast pulls live NOAA aviation-grade data so you can check the actual forecast for your departure date rather than relying on averages.
SQ23 is typically operated by the A359. Aircraft swaps happen — confirm with your booking before flying.
Approximately 18h 20m direct, covering 15,341 km at a typical cruise of FL410.
Historically calmest during May–September. Forecast accuracy improves as you get closer to departure — within 48 hours the NOAA WAFS model is at peak skill.