Your Flight
We analysed more than 26,500 data points along your route from George Bush Intercontinental Houston Airport, Houston to Sydney Kingsford Smith International Airport, Sydney (Mascot).
United Airlines
IAH
SYD
UA101
United Airlines · Live forecast
IAH
→
SYD
84
Calm Score
"A smooth ride ahead — sit back and enjoy."
17h 30m
Duration
7,471 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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Beta
You still have 15 hours before departure. We'll notify you if this forecast changes.
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.
Right now on your route
Live pilot reports from aircraft flying IAH → SYD
1 pilot report along this route
0 / 1
Reporting smooth
0 / 1
Light turbulence
1
Moderate or worse
Latest pilot reports
Moderate
IAH UA /OV IAH315020/TM 1017/FLDURGD/TP B737/TB MOD TURB 120 AND BELOW
17m ago
AI-powered flight briefing
26,500 data points analyzed
· HIGH confidence
Your Journey Beta
5 hours 30 minutes, 14 hours, and 15 hours 15 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 40 knots. These winds may delay arrival by up to 56 minutes.
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 17h 30min
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
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
Moderate
5:00-5:30
Moderate
5:30-6:00
Light
6:00-6:30
Smooth
6:30-7:00
Light
7:00-7:30
Light
7:30-8:00
Light
8:00-8:30
Light
8:30-9:00
Light
9:00-9:30
Light
9:30-10:00
Moderate
10:00-10:30
Light
10:30-11:00
Moderate
11:00-11:30
Light
11:30-12:00
Smooth
12:00-12:30
Smooth
12:30-13:00
Smooth
13:00-13:30
Smooth
13:30-14:00
Moderate
14:00-14:30
Light
14:30-15:00
Light
15:00-15:30
Moderate
15:30-16:00
Moderate
16:00-16:30
Moderate
16:30-17:00
Light
Landing
Moderate
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
IAH
George Bush Intercontinental Houston Airport — Departure
Wind
10 kt G32 (350°)
Sky
Scattered
Temperature
10°C
Conditions
VFR — Clear conditions, no delays expected
SYD
Sydney Kingsford Smith International Airport — Arrival
Wind
10 kt (20°)
Sky
NSC
Temperature
24°C
Conditions
VFR — Clear conditions, no delays expected
Your flight details
Departure timing and aircraft information
Evening Flight Departure
Time of day
Evening Flight
Tip
Evening and night flights typically offer smoother conditions as thermal activity subsides and the atmosphere stabilizes after sunset.
When
Tomorrow — conditions may change
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.