Your Flight
We analysed more than 15,000 data points along your route from Tokyo Haneda International Airport, Tokyo to Sydney Kingsford Smith International Airport, Sydney (Mascot).
HND
Tokyo Haneda International Airport
✈
SYD
Sydney Kingsford Smith International Airport
Route Information
Departure
HND (HND)
Distance
7,818.2 km (4,221.5 nautical miles)
Arrival
SYD (SYD)
Flight Time
595 minutes (9h 55m)
Flight Profile
Cruise Altitude: 39,000 ft (Flight Level 390)
Route calculated using great circle navigation
Turbulence comfort along route
Comfort score combines turbulence probability with intensity — higher means rougher
Smooth
Light
Moderate
Severe
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
15,000 data points analyzed
· HIGH confidence
Your Journey Beta
4 hours, 6 hours 10 minutes, and 8 hours 25 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 crossing the North Pacific Ocean, crossing the South Pacific Ocean, and over the Great Dividing Range – these areas can sometimes cause turbulence.
Smooth Flight
We're expecting smooth conditions throughout your flight. You can sit back and relax.
Takeoff
Takeoff should feel smooth with possible light bumps, with calm conditions around the airport.
Winds Aloft
Winds at cruising altitude are about 48 knots. These winds may delay arrival by up to 22 minutes.
Landing
Landing should feel smooth with possible light bumps 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 9h 55min
Maximum turbulence expected per segment
Takeoff
Light
0:30-1:00
Light
1:00-1:30
Light
1:30-2:00
Light
2:00-2:30
Light
2:30-3:00
Light
3:00-3:30
Light
3:30-4:00
Moderate
4:00-4:30
Moderate
4:30-5:00
Smooth
5:00-5:30
Smooth
5:30-6:00
Light
6:00-6:30
Moderate
6:30-7:00
Smooth
7:00-7:29
Smooth
7:29-7:58
Light
7:58-8:27
Light
8:27-8:56
Moderate
8:56-9:25
Light
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
HND
Tokyo Haneda International Airport — Departure
Wind
14 kt (10°)
Sky
Broken
Temperature
9°C
Conditions
VFR — Clear conditions, no delays expected
SYD
Sydney Kingsford Smith International Airport — Arrival
Wind
5 kt (350°)
Sky
NSC
Temperature
27°C
Conditions
VFR — Clear conditions, no delays expected
Your flight details
Departure timing and aircraft information
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.