When is the Seattle to Boston 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 BOS route?

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

Is turbulence on SEA to BOS dangerous?

No — turbulence on the SEA–BOS 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 BOS flight?

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

SEA to BOS Turbulence Forecast

Q: Is the Seattle to Boston flight turbulent?

The SEA–BOS route typically experiences moderate turbulence.

Q: Which seat is smoothest on SEA to BOS?

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 SEA to BOS?

The SEA to BOS flight takes approximately 5h 16m, covering 2,529 miles (2,198 nautical miles) at a cruising altitude of 37,000 feet.

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

Live forecast

SEA

→

BOS

Seattle · Boston · 5h 16m

6.5

Turb Score

5h 16m

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 SEA–BOS

0h1h2h3h4h5h6h5h 16m

Smooth

Light

Moderate

Heavy

About the SEA–BOS route

The Seattle to Boston 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.

Seattle to Boston Flight Time

How long is the flight from SEA to BOS?

5h 16m

Flight Time

2,529 mi

Distance

37,000 ft

Cruising Altitude

Boeing 737

Aircraft

The Seattle (SEA) to Boston (BOS) flight takes approximately 5h 16m, 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 SEA–BOS

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 SEA–BOS

Turbulence by month

Smooth

Light

Moderate

Rough

Best seat on SEA–BOS

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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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 Seattle–Boston 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

The 5h 16m flight had some light shaking around the halfway point. Nothing spilled, nobody panicked. Just normal flying.

Leisure traveler · September

There was some noticeable movement crossing the Rockies that made me grip the armrest. My seatmate (clearly a regular) didn't even look up from their book. Perspective.

First-time flyer · July

All SEA routes→ All BOS routes→

Frequently asked questions

Is the Seattle to Boston flight turbulent?

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

When is turbulence worst on SEA to BOS?

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 SEA to BOS?

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 SEA to BOS?

The SEA to BOS flight takes approximately 5h 16m, covering 2,529 miles (2,198 nautical miles).

Which airlines fly SEA to BOS?

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