SEA to HND Turbulence Forecast
Is the Seattle to Tokyo flight turbulent? Live forecast & historical patterns.
Typical turbulence along the route
Historical average pattern for SEA–HND
About the SEA–HND route
The Seattle to Tokyo route spans the Pacific Ocean — one of the longest commercial flight paths in the world at 4,792 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 4,792 miles (4,164 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 HND?
The Seattle (SEA) to Tokyo (HND) flight takes approximately 9h 55m, covering 4,792 miles (4,164 nautical miles) at 37,000 feet. The route is operated by United, American Airlines, Delta. Return flights (HND 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–HND
What to expect at each phase of the flight
Get minute-by-minute timing for your specific flight
Best time to fly SEA–HND
Turbulence by month
Best seat on SEA–HND
Boeing 777
What you'll see in the app
Full forecast, live map & seat recommendations
Similar routes
Other popular routes with turbulence data
Related guides
Learn more about flight turbulence
Passenger Reports
Frequently asked questions
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