HEL to NRT Turbulence Forecast

Q: Is the Helsinki to Tokyo flight turbulent?

The HEL–NRT route typically experiences moderate turbulence. A very smooth flight with minimal turbulence expected.

Q: Which seat is smoothest on HEL to NRT?

Wing seats are smoothest. On a 336, that's rows 24-36. Avoid the rear of the aircraft.

Q: How long is the flight from HEL to NRT?

The HEL to NRT flight takes approximately 9h 45min.

Is the Helsinki to Tokyo flight turbulent? Live forecast & historical patterns.

Live forecast

HEL

→

NRT

Helsinki · Tokyo · 9h 45min

Turb Score

9h 45min

Duration

4,584 nm

Distance

37,000 ft

Cruise Alt.

Moderate

Typical

⚠️ Moderate turbulence today

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Typical turbulence along the route

Historical average pattern for HEL–NRT

0h1h2h3h4h5h6h9h 45min

Smooth

Light

Moderate

Heavy

About the HEL–NRT route

The Helsinki to Tokyo route crosses the North Atlantic, where the jet stream is the primary source of turbulence. Flying at 37,000 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 Finnair, ANA on A · i · r · b · u · s · · A · 3 · 5 · 0 aircraft, with flights typically cruising at 37,000 feet over a distance of 5,277 miles (4,584 nautical miles).

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

Turbulence levels on HEL–NRT

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 HEL–NRT

Turbulence by month

Smooth

Light

Moderate

Rough

Best seat on HEL–NRT

336

Front

Rows 1–23

Light

✓ Wing

Rows 24-36

Smoothest

Rear

Rows 37+

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 →

Passenger Reports

Flew this in January expecting smooth skies based on past experience, but it was noticeably bumpier than usual. About an hour of moderate chop. Seatbelt sign basically stayed on.

Regular traveler · January

Moderate turbulence on descent — the kind where you're glad you kept your seatbelt on. Lasted about 30-40 minutes, then smoothed out. I've had worse on transatlantic routes.

Frequent flyer · April

The over the mountains section was legitimately rough. I was holding on to the armrests. Lasted maybe 40 minutes. One of the flight attendants had to sit down. Not a fun 9h 45min flight but we landed fine.

Solo traveler · May

All HEL routes→ All NRT routes→

Frequently asked questions

Is the Helsinki to Tokyo flight turbulent?

The HEL–NRT route typically experiences moderate turbulence. A very smooth flight with minimal turbulence expected. The turbulence score for this route is 5/100.

When is turbulence worst on HEL to NRT?

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 HEL to NRT?

Wing seats are always the smoothest. On a 336 (the most common aircraft on this route), that's rows 24-36. Avoid the very rear of the aircraft — it amplifies turbulence motion.

How long is the flight from HEL to NRT?

The HEL to NRT flight takes approximately 9h 45min, covering 5,277 miles (4,584 nautical miles).

Which airlines fly HEL to NRT?

The main airlines operating this route are Finnair, ANA, flying A · i · r · b · u · s · · A · 3 · 5 · 0 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