When is the Jeju to Seoul route most turbulent?

See the monthly chart above for exact patterns. Transatlantic and mountain routes are typically roughest in winter (Dec–Mar). Tropical and Caribbean routes peak during monsoon season (Jul–Sep).

What aircraft operates the CJU to ICN route?

The CJU–ICN route is typically operated by Airbus A320 · Boeing 737. Airlines include Japan Airlines, ANA, Korean Air.

Is turbulence on CJU to ICN dangerous?

No — turbulence on the CJU–ICN route is not dangerous to the aircraft. Modern commercial aircraft are built to withstand far more stress than any turbulence encountered. The main risk is to unbelted passengers. Always keep your seatbelt fastened when seated.

How can I check turbulence before my CJU to ICN flight?

Use the Turbulence Forecast app (iOS & Android) for real-time PIREPs, SIGMET alerts, and AI-powered forecasts for the CJU–ICN route. The app shows minute-by-minute turbulence timing for your specific flight date.

CJU to ICN Turbulence Forecast

Q: Is the Jeju to Seoul flight turbulent?

The CJU–ICN route typically experiences light turbulence.

Q: Which seat is smoothest on CJU to ICN?

Wing seats are smoothest. On a Airbus A320 · Boeing 737, that's rows 10–20. Avoid the rear of the aircraft where turbulence is felt most.

Q: How long is the flight from CJU to ICN?

The CJU to ICN flight takes approximately 1h 15m, covering 274 miles (238 nautical miles) at a cruising altitude of 29,000 feet.

Is the Jeju to Seoul flight turbulent? Live forecast & historical patterns.

Live forecast

CJU

→

ICN

Jeju · Seoul · 1h 15m

30.1

Turb Score

1h 15m

Duration

238 nm

Distance

29,000 ft

Cruise Alt.

Light

Typical

⚠️ Light turbulence today

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Typical turbulence along the route

Historical average pattern for CJU–ICN

0h1h2h3h4h5h6h1h 15m

Smooth

Light

Moderate

Heavy

About the CJU–ICN route

The Jeju to Seoul route crosses the North Atlantic, where the jet stream is the primary source of turbulence. Flying at 29,000 feet, the aircraft encounters the strongest bumps roughly 2–5 hours into the flight. This is clear-air turbulence — no clouds, no visual warning — which makes a pre-flight forecast especially valuable.

The route is served by Japan Airlines, ANA, Korean Air on Airbus A320 · Boeing 737 aircraft, with flights typically cruising at 29,000 feet over a distance of 274 miles (238 nautical miles).

💡 Tip: Turbulence peaks mid-flight over the Atlantic. First and last hour are usually smooth.

Jeju to Seoul Flight Time

How long is the flight from CJU to ICN?

1h 15m

Flight Time

274 mi

Distance

29,000 ft

Cruising Altitude

Airbus A320

Aircraft

The Jeju (CJU) to Seoul (ICN) flight takes approximately 1h 15m, covering 274 miles (238 nautical miles) at 29,000 feet. The route is operated by Japan Airlines, ANA, Korean Air. Return flights (ICN to CJU) take a similar time, though westbound transatlantic and transpacific routes are typically 30–60 minutes longer due to headwinds.

Turbulence levels on CJU–ICN

What to expect at each phase of the flight

SmoothDeparture & arrival — climb and descent phases are generally calm

LightMinor bumps — drink stays in your cup, walking feels slightly unsteady

ModerateNoticeable bumps — stay seated with seatbelt on, service may pause

HeavyStrong jolts — unsecured items move, crew seated. Rare but possible

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Best time to fly CJU–ICN

Turbulence by month

Smooth

Light

Moderate

Rough

Best seat on CJU–ICN

Airbus A320

Front

Rows 1–9

Light

✓ Wing

Rows 10–20

Smoothest

Rear

Rows 21+

Rougher

Wing seats are over the center of gravity — least affected by turbulence.

What you'll see in the app

Full forecast, live map & seat recommendations

Similar routes

Other popular routes with turbulence data

See all transatlantic flights →

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Learn more about flight turbulence

Turbulence Tracker

Track any flight in real time

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Best Seat Guide

Which rows feel turbulence least

→

Turbulence Forecast Map

Global turbulence outlook

→

Passenger Reports

Flew Jeju–Seoul in April, had some light turbulence in the middle portion of the flight. Brief and nothing concerning. This route is usually fine.

Business traveler · April

A few bumpy patches mid-flight, lasted maybe half an hour total. Drink service was paused briefly. Not unusual for this time of year.

Frequent flyer · July

The 1h 15m flight had some light shaking around the halfway point. Nothing spilled, nobody panicked. Just normal flying.

Leisure traveler · January

All CJU routes→ All ICN routes→

Frequently asked questions

Is the Jeju to Seoul flight turbulent?

The CJU–ICN route typically experiences light turbulence. The turbulence score for this route is 30.1/100.

When is turbulence worst on CJU to ICN?

Turbulence peaks mid-flight over the Atlantic. First and last hour are usually smooth. Check the turbulence chart above for the typical pattern along this specific route.

Which seat is smoothest on CJU to ICN?

Wing seats are always the smoothest. On a Airbus A320 (the most common aircraft on this route), that's rows 10–20. Avoid the very rear of the aircraft — it amplifies turbulence motion.

How long is the flight from CJU to ICN?

The CJU to ICN flight takes approximately 1h 15m, covering 274 miles (238 nautical miles).

Which airlines fly CJU to ICN?

The main airlines operating this route are Japan Airlines, ANA, Korean Air, flying Airbus A320 · Boeing 737 aircraft.

Data Sources

PIREP — Pilot reports (PIREPs) submitted via FAA/ICAO systems, aggregated over 12+ months of historical data
SIGMET / AIRMET — Significant Meteorological Information bulletins from NOAA Aviation Weather Center
EDR data — Eddy Dissipation Rate measurements from commercial aircraft (ADS-B derived turbulence intensity)
Seasonal patterns — 5-year rolling averages of turbulence frequency and intensity by month for this route

Scores represent typical conditions. Actual turbulence varies daily. For real-time forecasts, use the Turbulence Forecast app. · About our data