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. 4 bumpier stretches, about 660 min in total.
  • 0:00-1:00 · Takeoff · moderate bumps (~60 min) Noticeable bumps. The seatbelt sign is likely on.
  • 1:00-6:30 · light bumps (~330 min) Light movement. Drinks may ripple.
  • 6:30-7:00 · moderate bumps (~30 min) Noticeable bumps. The seatbelt sign is likely on.
  • 7:00-11:00 · Landing · light bumps (~240 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 DAL161 5755N01400W 0954 F360 5900N02000W 1019 5900N03000W MS44 233/70 KT N512DN DDL SYY 150954 J88A
5m ago
Smooth
ARP THY3 5757N01405W 0954 F340 5901N02000W 1020 5931N03000W MS44 230/65 KT TCJJO QXS BRR 150954 F18A
5m ago
Smooth
ARP UAL926 6051N02903W 0954 F390 5900N02000W 1028 GOMUP MS46 295/25 KT N45956 DDL KEF 150954 L54A
5m ago
Smooth
ARP DAL33 5612N01412W 0953 F360 BILTO 0957 5700N02000W MS44 228/82 KT N851NW DDL TRE 150953 J24A
6m ago
Smooth
ARP DAL10 5724N01316W 0951 F370 GOMUP 1004 GINGA MS44 231/74 KT N407DX DDL TRE 150951 J08A
8m 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

15 minutes, 26 minutes, and 7 hours 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 53 knots. These winds may delay arrival by up to 35 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
Moderate
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
Light
4:00-4:30
Light
4:30-5:00
Light
5:00-5:30
Light
5:30-6:00
Light
6:00-6:30
Light
6:30-7:00
Moderate
7:00-7:30
Light
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
8 kt (190°)
Sky
Few
Temperature
19°C
Conditions
MVFR - Reduced visibility, minor delays possible
SFO San Francisco International Airport - Arrival
Wind
5 kt (270°)
Sky
Clear
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.