When is the Seattle to Tokyo 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 SEA to NRT route?

The SEA–NRT route is typically operated by Boeing 777 · Airbus A350. Airlines include United, American Airlines, Delta.

Is turbulence on SEA to NRT dangerous?

No — turbulence on the SEA–NRT 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 SEA to NRT flight?

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

SEA to NRT Turbulence Forecast

Q: Is the Seattle to Tokyo flight turbulent?

The SEA–NRT route typically experiences light turbulence. Light turbulence may occur — mostly smooth with occasional bumps.

Q: Which seat is smoothest on SEA to NRT?

Wing seats are smoothest. On a Boeing 777 · Airbus A350, that's rows 20–38. Avoid the rear of the aircraft where turbulence is felt most.

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

The SEA to NRT flight takes approximately 9h 50m, covering 4,756 miles (4,133 nautical miles) at a cruising altitude of 37,000 feet.

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

Live forecast

SEA

→

NRT

Seattle · Tokyo · 9h 50m

39.0

Turb Score

9h 50m

Duration

4,133 nm

Distance

37,000 ft

Cruise Alt.

Light

Typical

⚠️ Light turbulence today

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Typical turbulence along the route

Historical average pattern for SEA–NRT

0h1h2h3h4h5h6h9h 50m

Smooth

Light

Moderate

Heavy

About the SEA–NRT route

The Seattle to Tokyo route spans the Pacific Ocean — one of the longest commercial flight paths in the world at 4,756 miles. The Pacific jet stream creates moderate turbulence, typically around 3–7 hours into the flight. The sheer length of the route means passengers experience varying conditions: calm stretches punctuated by bumpy patches.

The route is served by United, American Airlines, Delta on Boeing 777 · Airbus A350 aircraft, with flights typically cruising at 37,000 feet over a distance of 4,756 miles (4,133 nautical miles).

💡 Tip: Long flight — turbulence varies throughout. Wing seats significantly reduce motion.

Seattle to Tokyo Flight Time

How long is the flight from SEA to NRT?

9h 50m

Flight Time

4,756 mi

Distance

37,000 ft

Cruising Altitude

Boeing 777

Aircraft

The Seattle (SEA) to Tokyo (NRT) flight takes approximately 9h 50m, covering 4,756 miles (4,133 nautical miles) at 37,000 feet. The route is operated by United, American Airlines, Delta. Return flights (NRT to SEA) take a similar time, though westbound transatlantic and transpacific routes are typically 30–60 minutes longer due to headwinds.

Turbulence levels on SEA–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

Get minute-by-minute timing for your specific flight

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Best time to fly SEA–NRT

Turbulence by month

Smooth

Light

Moderate

Rough

Best seat on SEA–NRT

Boeing 777

Front

Rows 1–19

Light

✓ Wing

Rows 20–38

Smoothest

Rear

Rows 39+

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

San Francisco → Tokyo

See all transpacific flights →

Related guides

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Turbulence Tracker

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Best Seat Guide

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Clear-Air Turbulence

The invisible rough air that's increasing

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Turbulence in 2025

Is turbulence getting worse?

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Turbulence Forecast Map

Global turbulence outlook

→

Passenger Reports

Kids barely noticed the turbulence — just some mild bumps over the Pacific. Seatbelt sign was on and off a couple times. Nothing dramatic.

Parent traveling with kids · April

Flew Seattle–Tokyo in July, had some light turbulence in the middle portion of the flight. Brief and nothing concerning. This route is usually fine.

Business traveler · July

The 9h 50m flight had some light shaking around the halfway point. Nothing spilled, nobody panicked. Just normal flying.

Leisure traveler · January

All SEA routes→ All NRT routes→

Frequently asked questions

Is the Seattle to Tokyo flight turbulent?

The SEA–NRT route typically experiences light turbulence. Light turbulence may occur — mostly smooth with occasional bumps. The turbulence score for this route is 39.0/100.

When is turbulence worst on SEA to NRT?

Long flight — turbulence varies throughout. Wing seats significantly reduce motion. Check the turbulence chart above for the typical pattern along this specific route.

Which seat is smoothest on SEA to NRT?

Wing seats are always the smoothest. On a Boeing 777 (the most common aircraft on this route), that's rows 20–38. Avoid the very rear of the aircraft — it amplifies turbulence motion.

How long is the flight from SEA to NRT?

The SEA to NRT flight takes approximately 9h 50m, covering 4,756 miles (4,133 nautical miles).

Which airlines fly SEA to NRT?

The main airlines operating this route are United, American Airlines, Delta, flying Boeing 777 · Airbus A350 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