United Airlines PVG LAX UA199
United Airlines
FLIGHT
UA199
PVG
Shanghai Pudong International Airport
20:55
03 Mar
Now: --:-- CS
34 h 30 m
LAX
Los Angeles International Airport
15:25
04 Mar
Now: --:-- PS
Aircraft: b789 Altitude: 39,000ft (11.9km) Distance: 5,624 nm Duration: 34 h 30 m
AIRCRAFT
b789
ALTITUDE
39,000ft
DISTANCE
5,624 nm
DURATION
34 h 30 m
Times and gates subject to change. Verify with airline.
Turbulence Comfort Along Route Comfort View
Comfort Score: Combines turbulence probability (GTG forecast) with intensity (ZTI analysis). High scores indicate both high probability AND high intensity turbulence.
Smooth
Light
Moderate
Severe
Flight Smoothness Score
8.8 /10
Smoothness
Smooth Flight
53%
Smooth
47%
Light

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AI-Powered Flight Briefing
📊 20,000 data points analyzed HIGH Confidence
Your Flight

We analysed more than 20,000 data points along your route from Shanghai Pudong International Airport, Shanghai (Pudong) to Los Angeles International Airport, Los Angeles.

Your Journey Beta

Your route takes you crossing the North Pacific Ocean, crossing the North Pacific Ocean, and over the Sierra Nevada – 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 50 knots. These winds are favorable and may get you there up to 43 minutes early.

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 proprietary turbulence prediction algorithm combining atmospheric Richardson Number, wind shear analysis, temperature gradients, and geomagnetic activity for precise, real-time forecasting. Learn more
Live data from ECMWF global forecast models • 12 atmospheric pressure levels analyzed • Updated every 6 hours
Flight Timeline 34h 30min
Maximum turbulence expected per segment
Takeoff
Light
0:30-1:00
Smooth
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
Light
4:00-4:30
Light
4:30-5:00
Smooth
5:00-5:30
Smooth
5:30-6:00
Smooth
6:00-6:30
Light
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
Light
10:00-10:30
Smooth
10:30-11:00
Smooth
11:00-11:30
Light
11:30-12:00
Light
12:00-12:30
Light
12:30-13:00
Light
13:00-13:30
Light
13:30-14:00
Light
14:00-14:30
Light
14:30-15:00
Light
15:00-15:30
Light
15:30-16:00
Light
16:00-16:30
Smooth
16:30-17:00
Smooth
17:00-17:30
Smooth
17:30-18:00
Smooth
18:00-18:30
Smooth
18:30-19:00
Smooth
19:00-19:30
Smooth
19:30-20:00
Smooth
20:00-20:30
Smooth
20:30-21:00
Smooth
21:00-21:30
Smooth
21:30-22:00
Smooth
22:00-22:30
Smooth
22:30-23:00
Smooth
23:00-23:30
Smooth
23:30-24:00
Smooth
24:00-24:30
Smooth
24:30-25:00
Smooth
25:00-25:30
Smooth
25:30-26:00
Light
26:00-26:30
Light
26:30-27:00
Light
27:00-27:30
Light
27:30-28:00
Light
28:00-28:30
Light
28:30-29:00
Light
29:00-29:30
Light
29:30-30:00
Light
30:00-30:30
Light
30:30-31:00
Light
31:00-31:30
Light
31:30-32:00
Light
32:00-32:30
Light
32:30-33:00
Light
33:00-33:30
Smooth
33:30-34:00
Light
Landing
Light
Smooth
Light
Moderate
Severe
Longer bars indicate higher turbulence intensity. Values shown are the maximum for each time segment.
Turbulence Metrics ZTI and EDR (scaled)
ZTI Scale
Smooth
<12
Light
12-30
Moderate
30-45
Severe
>45
EDR Scale
Smooth
<6
Light
6-24
Moderate
24-42
Severe
>42

Airport Weather
Departure
PVG
Forecast
8°C (Now)
Broken • 8 kt • MVFR — Reduced visibility, minor delays possible
Arrival
LAX
At Arrival
17°C (Now)
Scattered • 3 kt • VFR — Clear conditions, no delays expected
🌤️ Afternoon Flight

Afternoon flights may encounter more turbulence due to thermal activity as the sun heats the ground, creating rising air currents.

Wide-Body Aircraft (Large)

Large, twin-aisle aircraft like this generally provide the smoothest ride through turbulence due to their size, weight, and advanced stabilization systems.

Looking for more detailed analysis?

Data Sources & Our Approach
ZeroTurb's Custom Algorithm: We've developed a proprietary ZeroTurb Index (ZTI) algorithm that combines three meteorological indices weighted by their predictive accuracy. This gives you transparent, passenger-focused turbulence probability instead of vague categories.

This forecast integrates data from:

Disclaimer: This forecast is for informational purposes only. Always consult official aviation weather sources and follow ATC guidance.

How accurate are turbulence alerts? Alerts are based on updated forecast models and pilot reports, and can change as departure approaches.