When is the Toronto to Seattle route most turbulent?

Check the monthly chart for exact patterns. Transatlantic and mountain routes are typically roughest in winter (Dec–Mar). Tropical routes peak during monsoon season.

YYZ to SEA Turbulence Forecast

Q: Is the Toronto to Seattle flight turbulent?

The YYZ–SEA route typically experiences smooth turbulence.

Q: Which seat is smoothest on YYZ to SEA?

Wing seats are smoothest. On a Airbus A320 · Boeing 737, that's rows 10–20. Avoid the rear of the aircraft.

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

The YYZ to SEA flight takes approximately 4h 30m, covering 2,055 miles at 35,000 feet.

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

Live forecast

YYZ

→

SEA

Toronto · Seattle · 4h 30m

2.2

Turb Score

4h 30m

Duration

1,785 nm

Distance

35,000 ft

Cruise Alt.

Smooth

Typical

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Typical turbulence along the route

Historical average pattern for YYZ–SEA

0h1h2h3h4h5h6h4h 30m

Smooth

Light

Moderate

Heavy

About the YYZ–SEA route

The Toronto to Seattle route crosses the North Atlantic, where the jet stream is the primary source of turbulence. Flying at 35,000 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 United, American Airlines, Delta on Airbus A320 · Boeing 737 aircraft, with flights typically cruising at 35,000 feet over a distance of 2,055 miles (1,785 nautical miles).

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

Toronto to Seattle Flight Time

How long is the flight from YYZ to SEA?

4h 30m

Flight Time

2,055 mi

Distance

35,000 ft

Cruising Altitude

Airbus A320

Aircraft

The Toronto (YYZ) to Seattle (SEA) flight takes approximately 4h 30m, covering 2,055 miles (1,785 nautical miles) at 35,000 feet. The route is operated by United, American Airlines, Delta. Return flights (SEA to YYZ) take a similar time, though westbound transatlantic and transpacific routes are typically 30–60 minutes longer due to headwinds.

Turbulence levels on YYZ–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

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Best time to fly YYZ–SEA

Turbulence by month

Smooth

Light

Moderate

Rough

Best seat on YYZ–SEA

Airbus A320

Front

Rows 1–9

Light

✓ Wing

Rows 10–20

Smoothest

Rear

Rows 21+

Rougher

Wing seats are over the center of gravity — least affected by turbulence.

What you'll see in the app

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Best Seat Guide

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Turbulence Forecast Map

Global turbulence outlook

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Passenger Reports

I always expect the worst on longer flights but this one surprised me. Very little turbulence, only a few small bumps on descent. Manageable even for me.

Nervous flyer · January

Fly this route pretty regularly for work. Most of the time it's smooth — March was completely fine, not a bump worth mentioning.

Business traveler · March

Was nervous about this flight but honestly didn't need to be. Smooth the whole way, the 4h 30m went by fast.

First-time passenger · January

All YYZ routes→ All SEA routes→

Frequently asked questions

Is the Toronto to Seattle flight turbulent?

The YYZ–SEA route typically experiences smooth turbulence. The turbulence score for this route is 2.2/100.

When is turbulence worst on YYZ to SEA?

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 YYZ to SEA?

Wing seats are always the smoothest. On a Airbus A320 (the most common aircraft on this route), that's rows 10–20. Avoid the very rear of the aircraft — it amplifies turbulence motion.

How long is the flight from YYZ to SEA?

The YYZ to SEA flight takes approximately 4h 30m, covering 2,055 miles (1,785 nautical miles).

Which airlines fly YYZ to SEA?

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