ICN
Incheon International Airport
✈
SFO
San Francisco International Airport
Distance
4,906 nm
Altitude
39,000 ft
Est. Duration
11h 15m
Route Information
Departure

ICN (ICN)

Distance

9,085.2 km (4,905.6 nautical miles)

Arrival

SFO (SFO)

Flight Time

2100 minutes (11h 0m)

Flight Profile

Cruise Altitude: 39,000 ft (Flight Level 390)

Route calculated using great circle navigation

Turbulence comfort along route
Comfort score combines turbulence probability with intensity, higher means rougher
Smooth Light Moderate Severe
Your flight, stretch by stretch
Some bumps expected. 8 bumpier stretches, about 1680 min in total.
  • 0:00-4:00 · Takeoff · light bumps (~240 min) Light movement. Drinks may ripple.
  • 4:00-5:00 · smooth
  • 5:00-6:00 · light bumps (~60 min) Light movement. Drinks may ripple.
  • 6:00-6:30 · smooth
  • 6:30-19:30 · light bumps (~780 min) Light movement. Drinks may ripple.
  • 19:30-23:30 · smooth
  • 23:30-26:00 · light bumps (~150 min) Light movement. Drinks may ripple.
  • 26:00-26:30 · moderate bumps (~30 min) Noticeable bumps. The seatbelt sign is likely on.
  • 26:30-28:30 · light bumps (~120 min) Light movement. Drinks may ripple.
  • 28:30-29:00 · moderate bumps (~30 min) Noticeable bumps. The seatbelt sign is likely on.
  • 29:00-33:30 · light bumps (~270 min) Light movement. Drinks may ripple.
  • 33:30-35:00 · Landing · smooth
💙
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.
AI-powered flight briefing
17,500 data points analyzed · HIGH confidence
Your Flight

We analysed more than 17,500 data points along your route from Incheon International Airport, Seoul to San Francisco International Airport, San Francisco.

Your Journey Beta

A brief bumpy patch may occur during cruise. It's nothing to worry about - just keep your seatbelt fastened.

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 71 knots. These winds are favorable and may get you there up to 60 minutes early.

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
Live data from ECMWF global forecast models · 12 atmospheric pressure levels · Updated every 6 hours
Flight Timeline 35h 00min
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
Light
2:30-3:00
Light
3:00-3:30
Light
3:30-4:00
Light
4:00-4:30
Smooth
4:30-5:00
Smooth
5:00-5:30
Light
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
Light
10:00-10:30
Light
10:30-11:00
Light
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
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
Light
19:00-19:30
Light
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
Light
24:00-24:30
Light
24:30-25:00
Light
25:00-25:30
Light
25:30-26:00
Light
26:00-26:30
Moderate
26:30-27:00
Light
27:00-27:30
Light
27:30-28:00
Light
28:00-28:30
Light
28:30-29:00
Moderate
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
Light
33:30-34:00
Smooth
34:00-34:30
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
ICN Incheon International Airport - Departure
Wind
15 kt G30 (220°)
Sky
Broken
Temperature
20°C
Conditions
VFR - Clear conditions, no delays expected
SFO San Francisco International Airport - Arrival
Wind
5 kt (270°)
Sky
Clear
Temperature
16°C
Conditions
VFR - Clear conditions, no delays expected
Your flight details
Departure timing and aircraft information
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:

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

Fly this route, calmly Game · Beta A calming mini-game. Glide ICN → SFO, with soft clouds where today's forecast shows bumpier air. Nothing to crash into.