ICN
Incheon International Airport
✈
SEA
Seattle–Tacoma International Airport
Distance
4,521 nm
Altitude
39,000 ft
Est. Duration
10h 23m
Route Information
Departure

ICN (ICN)

Distance

8,373.3 km (4,521.2 nautical miles)

Arrival

SEA (SEA)

Flight Time

2065 minutes (10h 25m)

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. 12 bumpier stretches, about 1645 min in total.
  • 0:00-3:00 · Takeoff · light bumps (~180 min) Light movement. Drinks may ripple.
  • 3:00-4:30 · smooth
  • 4:30-8:00 · light bumps (~210 min) Light movement. Drinks may ripple.
  • 8:00-8:30 · smooth
  • 8:30-9:30 · light bumps (~60 min) Light movement. Drinks may ripple.
  • 9:30-10:00 · moderate bumps (~30 min) Noticeable bumps. The seatbelt sign is likely on.
  • 10:00-10:30 · light bumps (~30 min) Light movement. Drinks may ripple.
  • 10:30-11:00 · smooth
  • 11:00-12:30 · light bumps (~90 min) Light movement. Drinks may ripple.
  • 12:30-13:30 · smooth
  • 13:30-19:30 · light bumps (~360 min) Light movement. Drinks may ripple.
  • 19:30-23:00 · smooth
  • 23:00-28:00 · light bumps (~300 min) Light movement. Drinks may ripple.
  • 28:00-29:00 · moderate bumps (~60 min) Noticeable bumps. The seatbelt sign is likely on.
  • 29:00-31:59 · light bumps (~179 min) Light movement. Drinks may ripple.
  • 31:59-32:28 · moderate bumps (~29 min) Noticeable bumps. The seatbelt sign is likely on.
  • 32:28-34:25 · Landing · light bumps (~117 min) Light movement. Drinks may ripple.
💙
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
16,000 data points analyzed · HIGH confidence
Your Flight

We analysed more than 16,000 data points along your route from Incheon International Airport, Seoul to Seattle–Tacoma International Airport, Seattle.

Your Journey Beta

9 hours 35 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 – conditions there 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 65 knots. These winds are favorable and may get you there up to 46 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 34h 25min
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
Smooth
3:30-4:00
Smooth
4:00-4:30
Smooth
4:30-5:00
Light
5:00-5:30
Light
5:30-6:00
Light
6:00-6:30
Light
6:30-7:00
Light
7:00-7:30
Light
7:30-8:00
Light
8:00-8:30
Smooth
8:30-9:00
Light
9:00-9:30
Light
9:30-10:00
Moderate
10:00-10:30
Light
10:30-11:00
Smooth
11:00-11:30
Light
11:30-12:00
Light
12:00-12:30
Light
12:30-13:00
Smooth
13:00-13:30
Smooth
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
Light
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
Light
26:30-27:00
Light
27:00-27:30
Light
27:30-28:00
Light
28:00-28:30
Moderate
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
31:30-31:59
Light
31:59-32:28
Moderate
32:28-32:57
Light
32:57-33:26
Light
33:26-33:55
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
ICN Incheon International Airport - Departure
Wind
15 kt G30 (220°)
Sky
Broken
Temperature
20°C
Conditions
VFR - Clear conditions, no delays expected
SEA Seattle–Tacoma International Airport - Arrival
Visibility
0 mi
Wind
7 kt (20°)
Sky
Broken
Temperature
11°C
Conditions
LIFR - Very poor visibility, significant 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 → SEA, with soft clouds where today's forecast shows bumpier air. Nothing to crash into.