When is the Washington DC to St. Thomas 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 IAD to STT route?

The IAD–STT route is typically operated by Boeing 737 · Airbus A320. Airlines include American, Delta, JetBlue, United.

Is turbulence on IAD to STT dangerous?

No — turbulence on the IAD–STT 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 IAD to STT flight?

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

IAD to STT Turbulence Forecast

Q: Is the Washington DC to St. Thomas flight turbulent?

The IAD–STT route typically experiences light turbulence. A very smooth flight with minimal turbulence expected.

Q: Which seat is smoothest on IAD to STT?

Wing seats are smoothest. On a Boeing 737 · Airbus A320, that's rows 10-20. Avoid the rear of the aircraft where turbulence is felt most.

Q: How long is the flight from IAD to STT?

The IAD to STT flight takes approximately 3h 05m, covering 1,609 miles (1,398 nautical miles) at a cruising altitude of 35,000 feet.

Is the Washington DC to St. Thomas flight turbulent? Live forecast & historical patterns.

Live forecast

IAD

→

STT

Washington DC · St. Thomas · 3h 05m

Turb Score

3h 05m

Duration

1,398 nm

Distance

35,000 ft

Cruise Alt.

Light

Typical

⚠️ Light turbulence today

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Typical turbulence along the route

Historical average pattern for IAD–STT

0h1h2h3h4h5h6h3h 05m

Smooth

Light

Moderate

Heavy

About the IAD–STT route

The Washington DC to St. Thomas route is one of the most popular leisure routes in North America, covering 1,609 miles over warm Caribbean waters. Turbulence is generally light — the main exception is tropical convective activity (thunderstorm-related turbulence) during hurricane season (June–November). Pilots typically route around storm cells when possible.

The route is served by American, Delta, JetBlue, United on Boeing 737 · Airbus A320 aircraft, with flights typically cruising at 35,000 feet over a distance of 1,609 miles (1,398 nautical miles).

💡 Tip: Mostly smooth. Hurricane season (Jun–Nov) can bring convective turbulence.

Washington DC to St. Thomas Flight Time

How long is the flight from IAD to STT?

3h 05m

Flight Time

1,609 mi

Distance

35,000 ft

Cruising Altitude

Boeing 737

Aircraft

The Washington DC (IAD) to St. Thomas (STT) flight takes approximately 3h 05m, covering 1,609 miles (1,398 nautical miles) at 35,000 feet. The route is operated by American, Delta, JetBlue, United. Actual flight time may vary by 10–20 minutes depending on wind conditions and routing.

Turbulence levels on IAD–STT

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 IAD–STT

Turbulence by month

Smooth

Light

Moderate

Rough

Best seat on IAD–STT

Boeing 737

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

Similar routes

Other popular routes with turbulence data

IAD → LHR

Washington DC → London

Moderate

IAD → FRA

Washington DC → Frankfurt

Moderate

LHR → IAD

London → Washington DC

Moderate

JFK → STT

New York → St. Thomas

See all caribbean flights →

Related guides

Learn more about flight turbulence

Turbulence Tracker

Track any flight in real time

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Best Seat Guide

Which rows feel turbulence least

→

When Does Turbulence Happen?

Phases of flight explained

→

Turbulence Forecast Map

Global turbulence outlook

→

Passenger Reports

Some light chop over the Caribbean — seatbelt sign came on for maybe 20 minutes but nothing to worry about. Typical for this route in January.

Regular traveler · January

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

Frequent flyer · November

The 3h 05m flight had some light shaking around the halfway point. Nothing spilled, nobody panicked. Just normal flying.

Leisure traveler · January

All IAD routes→ All STT routes→

Frequently asked questions

Is the Washington DC to St. Thomas flight turbulent?

The IAD–STT route typically experiences light turbulence. A very smooth flight with minimal turbulence expected. The turbulence score for this route is 2/100.

When is turbulence worst on IAD to STT?

Mostly smooth. Hurricane season (Jun–Nov) can bring convective turbulence. Check the turbulence chart above for the typical pattern along this specific route.

Which seat is smoothest on IAD to STT?

Wing seats are always the smoothest. On a Boeing 737 (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 IAD to STT?

The IAD to STT flight takes approximately 3h 05m, covering 1,609 miles (1,398 nautical miles).

Which airlines fly IAD to STT?

The main airlines operating this route are American, Delta, JetBlue, United, 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