JL5 Turbulence ForecastJapan Airlines · HND → JFK
About flight JL5
- Airline
- Japan Airlines (JL)
- Route
- HND → JFK
- Typical Aircraft
- B789
- Distance
- 10,875 km
- Duration
- 13h 09m
- Cruise Altitude
- FL410
See today’s turbulence forecast
Japan Airlines JL5 flies the mountain-wave sensitive route from Tokyo to New York. Conditions change hour to hour - view the live forecast for your departure date.
Check JL5 for your departure dateTurbulence 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.
Frequently asked questions
Is JL5 usually a bumpy flight?
Japan Airlines JL5 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 JL5 use?
JL5 is typically operated by the B789. 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 JL5 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 forecast models are at their sharpest.