Your Flight
We analysed more than 17,500 data points along your route from San Francisco International Airport, San Francisco to Incheon International Airport, Seoul.
SFO
San Francisco International Airport
✈
ICN
Incheon International Airport
Route Information
Departure
SFO (SFO)
Distance
9,085.2 km (4,905.6 nautical miles)
Arrival
ICN (ICN)
Flight Time
280 minutes (4h 40m)
Flight Profile
Cruise Altitude: 40,000 ft (Flight Level 400)
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 they don't put the aircraft in danger. Many passengers feel exactly the same way.
Right now on your route
Live pilot reports from aircraft flying SFO → ICN
1 pilot report along this route
1 / 1
Reporting smooth
0 / 1
Light turbulence
0
Moderate or worse
Latest pilot reports
Smooth
SFO UA /OV SFO010004/TM 1702/FL009/TP BCS3/SK BKN010-TOP022
10m ago
AI-powered flight briefing
17,500 data points analyzed
· HIGH confidence
Your Journey Beta
1 hour, 1 hour, and 2 hours 30 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 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 a bit bumpy initially, with calm conditions around the airport.
Winds Aloft
Winds at cruising altitude are about 43 knots. These winds may delay arrival by up to 27 minutes.
Landing
Landing should feel smooth 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 4h 40min
Maximum turbulence expected per segment
Takeoff
Moderate
0:30-0:58
Light
0:58-1:26
Moderate
1:26-1:54
Light
1:54-2:22
Moderate
2:22-2:49
Moderate
2:49-3:16
Light
3:16-3:43
Light
3:43-4:10
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
SFO
San Francisco International Airport - Departure
Wind
13 kt G24 (270°)
Sky
Broken
Temperature
16°C
Conditions
MVFR - Reduced visibility, minor delays possible
ICN
Incheon International Airport - Arrival
Wind
8 kt (230°)
Sky
Scattered
Temperature
27°C
Conditions
VFR - Clear conditions, no delays expected
Your flight details
Departure timing and aircraft information
b789
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.