When is the Houston 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.

IAH to SEA Turbulence Forecast

Q: Is the Houston to Seattle flight turbulent?

The IAH–SEA route typically experiences smooth turbulence.

Q: Which seat is smoothest on IAH 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 IAH to SEA?

The IAH to SEA flight takes approximately 4h 10m, covering 1,872 miles at 35,000 feet.

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

Live forecast

IAH

→

SEA

Houston · Seattle · 4h 10m

15.8

Turb Score

4h 10m

Duration

1,627 nm

Distance

35,000 ft

Cruise Alt.

Smooth

Typical

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Typical turbulence along the route

Historical average pattern for IAH–SEA

0h1h2h3h4h5h6h4h 10m

Smooth

Light

Moderate

Heavy

About the IAH–SEA route

The Houston to Seattle domestic route is generally one of the smoother flights in the US network, covering 1,872 miles at around 35,000 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 United, American Airlines, Delta on Airbus A320 · Boeing 737 aircraft, with flights typically cruising at 35,000 feet over a distance of 1,872 miles (1,627 nautical miles).

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

Houston to Seattle Flight Time

How long is the flight from IAH to SEA?

4h 10m

Flight Time

1,872 mi

Distance

35,000 ft

Cruising Altitude

Airbus A320

Aircraft

The Houston (IAH) to Seattle (SEA) flight takes approximately 4h 10m, covering 1,872 miles (1,627 nautical miles) at 35,000 feet. The route is operated by United, American Airlines, Delta. Actual flight time may vary by 10–20 minutes depending on wind conditions and routing.

Turbulence levels on IAH–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 IAH–SEA

Turbulence by month

Smooth

Light

Moderate

Rough

Best seat on IAH–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

Full forecast, live map & seat recommendations

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When Does Turbulence Happen?

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Turbulence Forecast Map

Global turbulence outlook

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Passenger Reports

Did Houston to Seattle last January and it was genuinely one of the smoothest long-haul flights I've had. Barely any movement the whole way.

Frequent flyer · January

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

Business traveler · April

Was nervous about this flight but honestly didn't need to be. Smooth the whole way, the 4h 10m went by fast.

First-time passenger · January

All IAH routes→ All SEA routes→

Frequently asked questions

Is the Houston to Seattle flight turbulent?

The IAH–SEA route typically experiences smooth turbulence. The turbulence score for this route is 15.8/100.

When is turbulence worst on IAH 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 IAH 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 IAH to SEA?

The IAH to SEA flight takes approximately 4h 10m, covering 1,872 miles (1,627 nautical miles).

Which airlines fly IAH 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