How long is flight SQ23?

The JFK to SIN route is the basis for the schedule. View the full route forecast and typical duration on the Turbcast route page.

Flight SQ23

SQ23 Turbulence ForecastSingapore Airlines · JFK → SIN

About flight SQ23

Singapore Airlines JFK to Singapore - among the world's longest commercial flights.

Airline: Singapore Airlines (SQ)
Route: JFK → SIN
Typical Aircraft: A359
Distance: 15,341 km
Duration: 18h 20m
Cruise Altitude: FL410

See today’s turbulence forecast

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 forecast

Check SQ23 on a specific date

Turbulence on the JFK → SIN route

The 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: Late spring to early autumn (May-September). The oceanic track sees its strongest jet-stream activity in the northern winter (Nov-Mar), when winds aloft are fastest and clear-air turbulence is more frequent.

Full JFK to SIN route guide

Frequently asked questions

Is SQ23 usually a bumpy flight?

Singapore 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.

What aircraft does SQ23 use?

SQ23 is typically operated by the A359. Aircraft swaps happen - confirm with your booking before flying.

How long is the JFK to SIN flight?

Approximately 18h 20m direct, covering 15,341 km at a typical cruise of FL410.

When does SQ23 have the smoothest weather?

Historically calmest during Late spring to early autumn (May-September). Forecast accuracy improves as you get closer to departure - within 48 hours the NOAA WAFS model is at peak skill.