Your Flight
We analysed more than 18,000 data points along your route from Shanghai Pudong International Airport, Shanghai (Pudong) to Seattle–Tacoma International Airport, Seattle.
Delta Air Lines
PVG
SEA
DL280
Delta Air Lines · Live forecast
PVG
→
SEA
85
Calm Score
"A smooth ride ahead — sit back and enjoy."
35h 11m
Duration
4,961 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
Notifications not available
Your flight departs in less than 6 hours. The forecast is unlikely to change significantly at this point.
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
18,000 data points analyzed
· HIGH confidence
Your Journey Beta
5 hours 30 minutes, 7 hours 40 minutes, and 8 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 crossing the North Pacific Ocean 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 smooth with possible light bumps, with calm conditions around the airport.
Winds Aloft
Winds at cruising altitude are about 35 knots. These winds are favorable and may get you there up to 25 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 turbulence prediction algorithm combining atmospheric Richardson Number, wind shear analysis, temperature gradients, and geomagnetic activity. Learn more
Flight Timeline 35h 11min
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
Light
5:00-5:30
Light
5:30-6:00
Moderate
6:00-6:30
Light
6:30-7:00
Light
7:00-7:30
Light
7:30-8:00
Moderate
8:00-8:30
Moderate
8:30-9:00
Light
9:00-9:30
Light
9:30-10:00
Smooth
10:00-10:30
Smooth
10:30-11:00
Light
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
Smooth
14:00-14:30
Smooth
14:30-15:00
Smooth
15:00-15:30
Light
15:30-16:00
Light
16:00-16:30
Light
16:30-17:00
Light
17:00-17:30
Light
17:30-18:00
Light
18:00-18:30
Light
18:30-19:00
Smooth
19:00-19:30
Smooth
19:30-20:00
Light
20:00-20:30
Light
20:30-21:00
Light
21:00-21:30
Light
21:30-22:00
Light
22:00-22:30
Light
22:30-23:00
Light
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
25:30-25:59
Smooth
25:59-26:28
Smooth
26:28-26:57
Light
26:57-27:26
Light
27:26-27:55
Light
27:55-28:24
Light
28:24-28:53
Light
28:53-29:22
Light
29:22-29:51
Light
29:51-30:20
Light
30:20-30:49
Light
30:49-31:18
Light
31:18-31:47
Light
31:47-32:16
Light
32:16-32:45
Light
32:45-33:14
Light
33:14-33:43
Light
33:43-34:12
Light
34:12-34:41
Smooth
Landing
Smooth
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
PVG
Shanghai Pudong International Airport — Departure
Visibility
4 mi
Wind
8 kt (30°)
Sky
Broken
Temperature
25°C
Conditions
MVFR — Reduced visibility, minor delays possible
SEA
Seattle–Tacoma International Airport — Arrival
Wind
5 kt (200°)
Sky
Scattered
Temperature
14°C
Conditions
VFR — Clear conditions, no delays expected
Your flight details
Departure timing and aircraft information
Morning Flight Departure
Time of day
Morning Flight
Tip
Morning flights typically experience smoother conditions as the atmosphere is more stable and thermal turbulence hasn't yet developed.
When
Today
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.