How long is flight NH9?

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

Flight NH9

NH9 Turbulence ForecastAll Nippon Airways · HND → JFK

About flight NH9

Airline: All Nippon Airways (NH)
Route: HND → JFK
Typical Aircraft: B777
Distance: 10,875 km
Duration: 13h 09m
Cruise Altitude: FL410

See today’s turbulence forecast

All Nippon Airways NH9 flies the mountain-wave sensitive route from Tokyo to New York. Conditions change hour to hour - view the live forecast for your departure date.

View live forecast

Check NH9 on a specific date

Turbulence on the HND → JFK route

The route crosses mid-latitudes where the polar jet can influence flight conditions, though exposure is shorter than on genuine long-haul crossings. The route crosses or passes near the Japanese Alps, which can generate mountain-wave turbulence downwind when upper-level winds are strong.

Calmest season: Late spring to early autumn (May-September). This corridor is most turbulent in the northern winter (Nov-Mar), when the jet stream is strongest and sits closer to the route. Wind flowing over the Japanese Alps can generate mountain-wave turbulence that extends hundreds of kilometres downwind - most pronounced in the northern winter (Nov-Mar), when upper-level winds are strongest.

Full HND to JFK route guide

Frequently asked questions

Is NH9 usually a bumpy flight?

All Nippon Airways NH9 operates between HND and JFK. 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 NH9 use?

NH9 is typically operated by the B777. Aircraft swaps happen - confirm with your booking before flying.

How long is the HND to JFK flight?

Approximately 13h 09m direct, covering 10,875 km at a typical cruise of FL410.

When does NH9 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.