When is the Boston to Seattle 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 BOS to SEA route?

The BOS–SEA route is typically operated by Boeing 737 · Airbus A320. Airlines include JetBlue, American, Delta, Alaska.

Is turbulence on BOS to SEA dangerous?

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

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

BOS to SEA Turbulence Forecast

Q: Is the Boston to Seattle flight turbulent?

The BOS–SEA route typically experiences moderate turbulence.

Q: Which seat is smoothest on BOS to SEA?

Wing seats are smoothest. On a Boeing 737 · Airbus A320, that's rows 15-22. Avoid the rear of the aircraft where turbulence is felt most.

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

The BOS to SEA flight takes approximately 4h 53m, covering 2,529 miles (2,198 nautical miles) at a cruising altitude of 37,000 feet.

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

Live forecast

BOS

→

SEA

Boston · Seattle · 4h 53m

6.5

Turb Score

4h 53m

Duration

2,198 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 BOS–SEA

0h1h2h3h4h5h6h4h 53m

Smooth

Light

Moderate

Heavy

About the BOS–SEA route

The Boston to Seattle domestic route is generally one of the smoother flights in the US network, covering 2,529 miles at around 37,000 feet. Turbulence is most common when weather systems cross the Midwest or when the flight path skirts the Rocky Mountains. Short duration means any rough patches pass quickly.

The route is served by JetBlue, American, Delta, Alaska on Boeing 737 · Airbus A320 aircraft, with flights typically cruising at 37,000 feet over a distance of 2,529 miles (2,198 nautical miles).

💡 Tip: Domestic routes are generally smoother. Mountain crossings are the main turbulence source.

Boston to Seattle Flight Time

How long is the flight from BOS to SEA?

4h 53m

Flight Time

2,529 mi

Distance

37,000 ft

Cruising Altitude

Boeing 737

Aircraft

The Boston (BOS) to Seattle (SEA) flight takes approximately 4h 53m, covering 2,529 miles (2,198 nautical miles) at 37,000 feet. The route is operated by JetBlue, American, Delta, Alaska. Actual flight time may vary by 10–20 minutes depending on wind conditions and routing.

Turbulence levels on BOS–SEA

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 BOS–SEA

Turbulence by month

Smooth

Light

Moderate

Rough

Best seat on BOS–SEA

Boeing 737

Front

Rows 1–14

Light

✓ Wing

Rows 15-22

Smoothest

Rear

Rows 23+

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

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Other popular routes with turbulence data

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Turbulence Tracker

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Best Seat Guide

Which rows feel turbulence least

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When Does Turbulence Happen?

Phases of flight explained

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Turbulence Forecast Map

Global turbulence outlook

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Passenger Reports

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

Business traveler · January

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

Frequent flyer · March

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

Parent traveling with kids · July

All BOS routes→ All SEA routes→

Frequently asked questions

Is the Boston to Seattle flight turbulent?

The BOS–SEA route typically experiences moderate turbulence. The turbulence score for this route is 6.5/100.

When is turbulence worst on BOS to SEA?

Domestic routes are generally smoother. Mountain crossings are the main turbulence source. Check the turbulence chart above for the typical pattern along this specific route.

Which seat is smoothest on BOS to SEA?

Wing seats are always the smoothest. On a Boeing 737 (the most common aircraft on this route), that's rows 15-22. Avoid the very rear of the aircraft — it amplifies turbulence motion.

How long is the flight from BOS to SEA?

The BOS to SEA flight takes approximately 4h 53m, covering 2,529 miles (2,198 nautical miles).

Which airlines fly BOS to SEA?

The main airlines operating this route are JetBlue, American, Delta, Alaska, flying Boeing 737 · Airbus A320 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