LHR
London Heathrow Airport
✈
SFO
San Francisco International Airport
Distance
4,652 nm
Altitude
40,000 ft
Est. Duration
10h 41m
Route Information
Departure

LHR (LHR)

Distance

8,615.9 km (4,652.2 nautical miles)

Arrival

SFO (SFO)

Flight Time

660 minutes (11h 0m)

Flight Profile

Cruise Altitude: 40,000 ft (Flight Level 400)

Route calculated using great circle navigation

Turbulence comfort along route
Comfort score combines turbulence probability with intensity, higher means rougher
Smooth Light Moderate Severe
Your flight, stretch by stretch
Some bumps expected. 6 bumpier stretches, about 510 min in total.
  • 0:00-0:30 · Takeoff · moderate bumps (~30 min) Noticeable bumps. The seatbelt sign is likely on.
  • 0:30-3:30 · light bumps (~180 min) Light movement. Drinks may ripple.
  • 3:30-5:30 · smooth
  • 5:30-6:00 · light bumps (~30 min) Light movement. Drinks may ripple.
  • 6:00-6:30 · moderate bumps (~30 min) Noticeable bumps. The seatbelt sign is likely on.
  • 6:30-7:00 · light bumps (~30 min) Light movement. Drinks may ripple.
  • 7:00-7:30 · smooth
  • 7:30-11:00 · Landing · light bumps (~210 min) Light movement. Drinks may ripple.
💙
We know turbulence can feel scary - especially on long flights. This report is built for you: what bumps feel like, when they happen, and why they don't put the aircraft in danger. Many passengers feel exactly the same way.
Right now on your route
Live pilot reports from aircraft flying LHR → SFO
15 pilot reports along this route
15 / 15
Reporting smooth
0 / 15
Light turbulence
0
Moderate or worse
Latest pilot reports
Smooth
ARP ICE417 5645N01241W 1235 F380 AGORI 1237 6100N02000W MS51 188/110 KT TFISN QXS BRR 301235 A84A
2m ago
Smooth
ARP ICE417 5645N01242W 1235 F380 AGORI 1237 6100N02000W MS51 188/110 KT TFISN QXS BRR 301235 A89A
2m ago
Smooth
ARP DLH3V 5649N01406W 1235 F360 SUNOT 1239 5800N02000W MS50 192/128 KT DAIGT DDL BLY 301235 J35A
2m ago
Smooth
ARP BAW283 5630N01107W 1234 F320 5656N01242W 1241 AGORI MS41 193/105 KT GSTBM DDL SYY 301234 F21A
3m ago
Smooth
ARP UAL908 5655N01355W 1232 F340 SUNOT 1237 5800N02000W MS47 191/137 KT N675UA DDL TRE 301232 F66A
5m ago
AI-powered flight briefing
16,500 data points analyzed · HIGH confidence
Your Flight

We analysed more than 16,500 data points along your route from London Heathrow Airport, London to San Francisco International Airport, San Francisco.

Your Journey Beta

6 hours 30 minutes into the flight: Some moderate bumps expected.
The crew may adjust altitude or ask you to stay seated during these sections.
The rest of the flight should be smooth.

Your route takes you crossing the North Atlantic Ocean, over the Rocky Mountains, and over the Sierra Nevada – these areas can sometimes cause turbulence.

Smooth Flight

We're expecting smooth conditions throughout your flight. You can sit back and relax.

Takeoff

Takeoff should feel a bit bumpy initially, with calm conditions around the airport.

Winds Aloft

Winds at cruising altitude are about 43 knots. These winds may delay arrival by up to 18 minutes.

Landing

Landing should feel smooth with possible light bumps with typical approach conditions.

You're in Safe Hands

If you feel nervous at any point, remember that turbulence is expected, safe, and part of normal flying. The crew is monitoring everything, and the aircraft is built to handle far more than anything you will feel. Have a safe and calm flight.

Relaxation Exercises
ZeroTurb Index (ZTI): Powered by our turbulence prediction algorithm combining atmospheric Richardson Number, wind shear analysis, temperature gradients, and geomagnetic activity. Learn more
Live data from ECMWF global forecast models · 12 atmospheric pressure levels · Updated every 6 hours
Flight Timeline 11h 00min
Maximum turbulence expected per segment
Takeoff
Moderate
0:30-1:00
Light
1:00-1:30
Light
1:30-2:00
Light
2:00-2:30
Light
2:30-3:00
Light
3:00-3:30
Light
3:30-4:00
Smooth
4:00-4:30
Smooth
4:30-5:00
Smooth
5:00-5:30
Smooth
5:30-6:00
Light
6:00-6:30
Moderate
6:30-7:00
Light
7:00-7:30
Smooth
7:30-8:00
Light
8:00-8:30
Light
8:30-9:00
Light
9:00-9:30
Light
9:30-10:00
Light
10:00-10:30
Light
Landing
Light
Smooth
Light
Moderate
Severe
Longer bars indicate higher turbulence intensity. Values shown are the maximum for each time segment.
Airport conditions
Live weather at departure and arrival
LHR London Heathrow Airport - Departure
Wind
3 kt (90°)
Sky
Broken
Temperature
15°C
Conditions
VFR - Clear conditions, no delays expected
SFO San Francisco International Airport - Arrival
Wind
4 kt (300°)
Sky
Broken
Temperature
14°C
Conditions
VFR - Clear conditions, no delays expected
Your flight details
Departure timing and aircraft information
Data sources & our approach
ZeroTurb's Custom Algorithm: Our proprietary ZeroTurb Index (ZTI) combines three meteorological indices weighted by their predictive accuracy - giving you transparent, passenger-focused turbulence probability instead of vague categories.

This forecast integrates data from:

Disclaimer: This forecast is for informational purposes only. Always consult official aviation weather sources and follow ATC guidance.

Fly this route, calmly Game · Beta A calming mini-game. Glide LHR → SFO, with soft clouds where today's forecast shows bumpier air. Nothing to crash into.