Your Flight
We analysed more than 18,500 data points along your route from El Prat De Llobregat, Barcelona to San Francisco International Airport, San Francisco.
Level
BCN
SFO
LL2621
Level · Live forecast
BCN
→
SFO
83
Calm Score
"A smooth ride ahead — sit back and enjoy."
12h 50m
Duration
5,175 nm
Distance
40,000 ft
Cruise Altitude
HIGH
Confidence
Turbulence comfort along route
Comfort score combines turbulence probability with intensity — higher means rougher
Smooth
Light
Moderate
Severe
Set an alert before your flight
Beta
You still have 9 hours before departure. We'll notify you if this forecast changes.
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 you'll be completely safe. 1 in 3 passengers feel exactly like you.
Right now on your route
Live pilot reports from aircraft flying BCN → SFO
13 pilot reports along this route
13 / 13
Reporting smooth
0 / 13
Light turbulence
0
Moderate or worse
Latest pilot reports
Smooth
ARP UAL40 5456N02112W 0208 F350 5500N02000W 0212 RESNO MS51 258/109 KT N2645U DDL XXH 110208 F73A
4m ago
Smooth
ARP DAL218 5554N02122W 0204 F350 5559N02000W 0209 5559N01500W MS50 255/105 KT N1200K QXT IGW 110204 F87A
8m ago
Smooth
ARP KFE821 6110N04110W 0204 F410 6100N04000W 0209 5900N03000W MS42 139/4 KT 9HKIM DDL UAK 110204 F43A
8m ago
Smooth
ARP SAS950 5634N02507W 0202 F340 5658N02000W 0221 5658N01500W MS47 247/85 KT SEDMO DDL IG1 110202 J67A
10m ago
Smooth
ARP UAL944 5742N04112W 0202 F350 5800N04000W 0207 6000N03000W MS45 338/4 KT N16009 DDL UAK 110202 L83A
10m ago
AI-powered flight briefing
18,500 data points analyzed
· HIGH confidence
Your Journey Beta
36 minutes, 44 minutes, and 7 hours 50 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 over the Pyrenees, 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 smooth with possible light bumps, with calm conditions around the airport.
Winds Aloft
Winds at cruising altitude are about 48 knots. These winds may delay arrival by up to 44 minutes.
Landing
Landing should feel a bit bumpy on descent 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
Flight Timeline 12h 50min
Maximum turbulence expected per segment
Takeoff
Light
0:30-1:00
Moderate
1:00-1:30
Moderate
1:30-2:00
Light
2:00-2:30
Light
2:30-3:00
Moderate
3:00-3:30
Light
3:30-4:00
Light
4:00-4:30
Smooth
4:30-5:00
Smooth
5:00-5:30
Smooth
5:30-6:00
Smooth
6:00-6:30
Light
6:30-7:00
Light
7:00-7:30
Moderate
7:30-7:59
Moderate
7:59-8:28
Light
8:28-8:57
Light
8:57-9:26
Light
9:26-9:55
Light
9:55-10:24
Smooth
10:24-10:53
Light
10:53-11:22
Light
11:22-11:51
Light
11:51-12:20
Moderate
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
BCN
El Prat De Llobregat — Departure
Wind
8 kt (180°)
Sky
Scattered
Temperature
21°C
Conditions
VFR — Clear conditions, no delays expected
SFO
San Francisco International Airport — Arrival
Wind
14 kt (320°)
Sky
Clear
Temperature
20°C
Conditions
VFR — Clear conditions, no delays expected
Your flight details
Departure timing and aircraft information
Afternoon Flight Departure
Time of day
Afternoon Flight
Tip
Afternoon flights may encounter more turbulence due to thermal activity as the sun heats the ground, creating rising air currents.
When
Today
airbus a330-202
Category
Wide-Body Aircraft
Size
Large
Comfort
Large, twin-aisle aircraft like this generally provide the smoothest ride through turbulence due to their size, weight, and advanced stabilization systems.
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:
- ECMWF Open Data — Global atmospheric model (wind/temperature at 13 flight levels)
- NOAA Aviation Weather Center — Pilot Reports (PIREPs), SIGMETs/AIRMETs, TAFs
- NOAA Space Weather Prediction Center — Aurora forecasts for polar routes
- AviationStack API — Flight schedules and airline operational data
Disclaimer: This forecast is for informational purposes only. Always consult official aviation weather sources and follow ATC guidance.