Your Flight
We analysed more than 21,000 data points along your route from John F Kennedy International Airport, New York to Tokyo Haneda International Airport, Tokyo.
Japan Airlines
JFK
HND
JL5
Japan Airlines · Live forecast
JFK
→
HND
Also sold as:
91
Calm Score
"A smooth ride ahead — sit back and enjoy."
14h 20m
Duration
5,872 nm
Distance
40,000 ft
Cruise Altitude
HIGH
Confidence
Turbulence comfort along route
Comfort score combines turbulence probability with intensity, higher means rougher
Smooth
Light
Moderate
Severe
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We know turbulence can feel scary — especially on long flights.
This report is built for you: what bumps feel like, when they happen, and why you'll be completely safe. 1 in 3 passengers feel exactly like you.
AI-powered flight briefing
21,000 data points analyzed
· HIGH confidence
Your Journey Beta
23 minutes and 12 hours 35 minutes into the flight: Some moderate bumps expected.
The crew may adjust altitude or ask you to stay seated during these sections.
The rest of the flight should be smooth.
Your route takes you over the Appalachian Mountains and crossing the North Pacific Ocean – these areas can sometimes cause light turbulence.
Smooth Flight
We're expecting smooth conditions throughout your flight. You can sit back and relax.
Takeoff
Takeoff should feel a bit bumpy initially, with calm conditions around the airport.
Winds Aloft
Winds at cruising altitude are about 27 knots.
Landing
Landing should feel a bit bumpy on descent with typical approach conditions.
You're in Safe Hands
If you feel nervous at any point, remember that turbulence is expected, safe, and part of normal flying. The crew is monitoring everything, and the aircraft is built to handle far more than anything you will feel. Have a safe and calm flight.
Relaxation Exercises
ZeroTurb Index (ZTI): Powered by our turbulence prediction algorithm combining atmospheric Richardson Number, wind shear analysis, temperature gradients, and geomagnetic activity. Learn more
Flight Timeline 14h 20min
Maximum turbulence expected per segment
Takeoff
Moderate
0:30-1:00
Light
1:00-1:30
Smooth
1:30-2:00
Smooth
2:00-2:30
Smooth
2:30-3:00
Light
3:00-3:30
Light
3:30-4:00
Light
4:00-4:30
Light
4:30-5:00
Light
5:00-5:30
Smooth
5:30-6:00
Smooth
6:00-6:30
Light
6:30-7:00
Light
7:00-7:30
Smooth
7:30-8:00
Light
8:00-8:30
Light
8:30-9:00
Smooth
9:00-9:29
Smooth
9:29-9:58
Smooth
9:58-10:27
Light
10:27-10:56
Light
10:56-11:25
Light
11:25-11:54
Light
11:54-12:23
Smooth
12:23-12:52
Moderate
12:52-13:21
Light
13:21-13:50
Moderate
Landing
Light
Smooth
Light
Moderate
Severe
Longer bars indicate higher turbulence intensity. Values shown are the maximum for each time segment.
Airport conditions
Live weather at departure and arrival
JFK
John F Kennedy International Airport — Departure
Wind
11 kt (230°)
Sky
Scattered
Temperature
26°C
Conditions
VFR — Clear conditions, no delays expected
HND
Tokyo Haneda International Airport — Arrival
Wind
6 kt (40°)
Sky
Broken
Temperature
23°C
Conditions
MVFR — Reduced visibility, minor delays possible
Your flight details
Departure timing and aircraft information
Afternoon Flight Departure
Time of day
Afternoon Flight
Tip
Afternoon flights may encounter more turbulence due to thermal activity as the sun heats the ground, creating rising air currents.
When
Today
airbus a350-1041
Category
Wide-Body Aircraft
Size
Large
Comfort
Large, twin-aisle aircraft like this generally provide the smoothest ride through turbulence due to their size, weight, and advanced stabilization systems.
Data sources & our approach
ZeroTurb's Custom Algorithm: Our proprietary
ZeroTurb Index (ZTI) combines three meteorological indices weighted by their
predictive accuracy — giving you transparent, passenger-focused turbulence probability instead
of vague categories.
This forecast integrates data from:
- ECMWF Open Data — Global atmospheric model (wind/temperature at 13 flight levels)
- NOAA Aviation Weather Center — Pilot Reports (PIREPs), SIGMETs/AIRMETs, TAFs
- NOAA Space Weather Prediction Center — Aurora forecasts for polar routes
- AviationStack API — Flight schedules and airline operational data
Disclaimer: This forecast is for informational purposes only. Always consult official aviation weather sources and follow ATC guidance.