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IAH to LHR Turbulence Forecast

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

Live forecast
IAH
→
LHR
Houston · London · 9h 30m
62
Turb Score
9h 30m
Duration
4,840 nm
Distance
38,000 ft
Cruise Alt.
Moderate
Typical
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Typical turbulence along the route

Historical average pattern for IAH–LHR

Smooth Light Moderate
0h1h2h3h4h5h6h9h 30m
Smooth
Light
Moderate
Heavy

About the IAH–LHR route

The Houston to London route crosses the North Atlantic, where the jet stream is the primary source of turbulence. Flying at 38,000 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 Airlines, British Airways on Boeing 787 · Boeing 777 aircraft, with flights typically cruising at 38,000 feet over a distance of 5,568 miles (4,840 nautical miles).

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

Turbulence levels on IAH–LHR

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–LHR

Turbulence by month

J
F
M
A
M
J
J
A
S
O
N
D
Smooth
Light
Moderate
Rough

Best seat on IAH–LHR

Boeing 787

Front
Rows 1–19
Light
✓ Wing
Rows 20–36
Smoothest
Rear
Rows 37+
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

IAH to LHR turbulence forecast app
Flight turbulence tracker
Real-time turbulence map

Similar routes

Other popular routes with turbulence data

DFW → LHR
Dallas → London
Moderate
ATL → LHR
Atlanta → London
Moderate
JFK → LHR
New York → London
Moderate
ORD → LHR
Chicago → London
Moderate
IAH → JFK
Houston → New York
Light
IAH → LAX
Houston → Los Angeles
Light
See all transatlantic flights →
All IAH routes→ All LHR routes→

Frequently asked questions

Is the Houston to London flight turbulent?
The IAH–LHR route typically experiences moderate turbulence. Moderate turbulence expected — fasten seatbelt when seated. The turbulence score for this route is 62/100.
When is turbulence worst on IAH to LHR?
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 IAH to LHR?
Wing seats are always the smoothest. On a Boeing 787 (the most common aircraft on this route), that's rows 20–36. Avoid the very rear of the aircraft — it amplifies turbulence motion.
How long is the flight from IAH to LHR?
The IAH to LHR flight takes approximately 9h 30m, covering 5,568 miles (4,840 nautical miles).
Which airlines fly IAH to LHR?
The main airlines operating this route are United Airlines, British Airways, flying Boeing 787 · Boeing 777 aircraft.