When is the London 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 LHR to STT route?

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

Is turbulence on LHR to STT dangerous?

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

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

LHR to STT Turbulence Forecast

Q: Is the London to St. Thomas flight turbulent?

The LHR–STT route typically experiences light-to-moderate turbulence. A very smooth flight with minimal turbulence expected.

Q: Which seat is smoothest on LHR 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.

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

Live forecast

LHR

→

STT

London · St. Thomas · 8h

Turb Score

Duration

3,600 nm

Distance

35,000 ft

Cruise Alt.

Light-to-Moderate

Typical

⚠️ Light-to-Moderate turbulence today

Get exact timing, altitude & best seat — free

Download free on the App Store ★★★★★ 4.8 · 20K+ reviews Get it on Google Play ★★★★★ 4.8 · 20K+ reviews

★★★★★ 4.8 · 20,000+ reviews · iOS & Android

Scan to get the full forecast ★★★★★ 4.8 · 20,000+ reviews · iOS & Android · Free

Typical turbulence along the route

Historical average pattern for LHR–STT

0h1h2h3h4h5h6h8h

Smooth

Light

Moderate

Heavy

About the LHR–STT route

The London to St. Thomas 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 American, Delta, JetBlue, United on Boeing 737 · Airbus A320 aircraft, with flights typically cruising at 35,000 feet over a distance of 4,143 miles (3,600 nautical miles).

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

London to St. Thomas Flight Time

How long is the flight from LHR to STT?

Flight Time

4,143 mi

Distance

35,000 ft

Cruising Altitude

Boeing 737

Aircraft

The London (LHR) to St. Thomas (STT) flight takes approximately 8h, covering 4,143 miles (3,600 nautical miles) at 35,000 feet. The route is operated by American, Delta, JetBlue, United. Return flights (STT to LHR) take a similar time, though westbound transatlantic and transpacific routes are typically 30–60 minutes longer due to headwinds.

Turbulence levels on LHR–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

Download on the App Store ★★★★★ 4.8 · 20K+ reviews Get it on Google Play ★★★★★ 4.8 · 20K+ reviews

Best time to fly LHR–STT

Turbulence by month

Smooth

Light

Moderate

Rough

Best seat on LHR–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

New York → St. Thomas

See all transatlantic flights →

Related guides

Learn more about flight turbulence

Turbulence Tracker

Track any flight in real time

→

Best Seat Guide

Which rows feel turbulence least

→

Clear-Air Turbulence

The invisible rough air that's increasing

→

Turbulence in 2025

Is turbulence getting worse?

→

Turbulence Forecast Map

Global turbulence outlook

→

Passenger Reports

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

First-time flyer · January

The 8h flight had some light shaking around the halfway point. Nothing spilled, nobody panicked. Just normal flying.

Leisure traveler · May

Flew London–St. Thomas in June, had some light turbulence in the middle portion of the flight. Brief and nothing concerning. This route is usually fine.

Business traveler · June

All LHR routes→ All STT routes→

Frequently asked questions

Is the London to St. Thomas flight turbulent?

The LHR–STT route typically experiences light-to-moderate turbulence. A very smooth flight with minimal turbulence expected. The turbulence score for this route is 3/100.

When is turbulence worst on LHR to STT?

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 LHR 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 LHR to STT?

The LHR to STT flight takes approximately 8h, covering 4,143 miles (3,600 nautical miles).

Which airlines fly LHR 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