Your Flight
We analysed more than 16,500 data points along your route from Chicago O'Hare International Airport, Chicago to Guarulhos - Governador André Franco Montoro International Airport, São Paulo.
United Airlines
ORD
GRU
UA845
United Airlines · Live forecast
ORD
→
GRU
49
Calm Score
"Some bumps expected — keep your seatbelt fastened."
10h 25m
Duration
4,551 nm
Distance
39,000 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
16,500 data points analyzed
· HIGH confidence
Your Journey Beta
18 minutes and 1 hour into the flight: Expect more intense turbulence. Keep your seatbelt fastened.
3 hours 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, crossing the North Atlantic Ocean, and over the Andes – these areas can sometimes cause turbulence.
Some Bumps Ahead
There are a couple of short sections with bumps, but nothing out of the ordinary. Turbulence can feel uncomfortable, but it is not dangerous. Aircraft are designed to handle it easily. Pilots often adjust altitude or route to find smoother air.
Takeoff
Takeoff should feel expect some bumps during climb, with calm conditions around the airport.
Winds Aloft
Standard wind conditions expected at cruising altitude.
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 10h 25min
Maximum turbulence expected per segment
Takeoff
Severe
0:30-1:00
Moderate
1:00-1:30
Severe
1:30-2:00
Moderate
2:00-2:30
Moderate
2:30-3:00
Moderate
3:00-3:30
Moderate
3:30-4:00
Moderate
4:00-4:30
Moderate
4:30-5:00
Moderate
5:00-5:30
Moderate
5:30-6:00
Moderate
6:00-6:30
Moderate
6:30-7:00
Moderate
7:00-7:30
Moderate
7:30-7:59
Moderate
7:59-8:28
Moderate
8:28-8:57
Light
8:57-9:26
Smooth
9:26-9:55
Moderate
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
ORD
Chicago O'Hare International Airport — Departure
Visibility
1 mi
Wind
18 kt G28 (300°)
Sky
Broken
Temperature
-2°C
Conditions
LIFR — Very poor visibility, significant delays expected
GRU
Guarulhos - Governador André Franco Montoro International Airport — Arrival
Visibility
5 mi
Wind
5 kt (70°)
Sky
NSC
Temperature
18°C
Conditions
MVFR — Reduced visibility, minor delays possible
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
Today
b78x
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.