Your Flight
We analysed more than 8,000 data points along your route from San Francisco International Airport, San Francisco to John F Kennedy International Airport, New York.
Delta Air Lines
SFO
JFK
DL405
Delta Air Lines
FLIGHT
DL405
SFO
San Francisco International Airport
23:05
17 Jan
Now: --:-- PS
5 h 34 m
JFK
John F Kennedy International Airport
07:39
18 Jan
Now: --:-- ES
Aircraft: b763
Altitude: 39,000ft (11.9km)
Distance: 2,242 nm
Duration: 5 h 34 m
Also sold by:
AIRCRAFT
b763
ALTITUDE
39,000ft
DISTANCE
2,242 nm
DURATION
5 h 34 m
ALSO SOLD BY
Times and gates subject to change. Verify with airline.
Turbulence Comfort Along Route Comfort View
Comfort Score: Combines turbulence probability (GTG forecast) with intensity (ZTI analysis).
High scores indicate both high probability AND high intensity turbulence.
Smooth
Light
Moderate
Severe
Flight Smoothness Score
8.4
/10
Smoothness
Smooth Flight
39%
Smooth
60%
Light
1%
Moderate
Set an alert before your flight
Beta
You still have 19 hours before departure. We'll notify you if this forecast changes.
AI-Powered Flight Briefing
📊 8,000 data points analyzed
HIGH Confidence
Your Journey Beta
4 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 over the Sierra Nevada, over the Rocky Mountains, and over the Appalachian Mountains – 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 63 knots. These winds are favorable and may get you there up to 19 minutes early.
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 proprietary turbulence prediction algorithm combining atmospheric Richardson Number, wind shear analysis, temperature gradients, and geomagnetic activity for precise, real-time forecasting. Learn more
Flight Timeline 5h 34min
Maximum turbulence expected per segment
Takeoff
Light
0:30-0:58
Smooth
0:58-1:26
Light
1:26-1:54
Light
1:54-2:22
Light
2:22-2:49
Light
2:49-3:16
Smooth
3:16-3:43
Light
3:43-4:10
Light
4:10-4:37
Moderate
4:37-5:04
Light
Landing
Light
Smooth
Light
Moderate
Severe
Longer bars indicate higher turbulence intensity. Values shown are the maximum for each time segment.
Turbulence Metrics ZTI and EDR (scaled)
ZTI Scale
Smooth
<12
<12
Light
12-30
12-30
Moderate
30-45
30-45
Severe
>45
>45
EDR Scale
Smooth
<6
<6
Light
6-24
6-24
Moderate
24-42
24-42
Severe
>42
>42
Airport Weather
Departure
SFO
9°C
(Now)
Clear
•
5 kt
•
VFR — Clear conditions, no delays expected
Arrival
JFK
2°C
(Now)
Broken
•
12 kt
•
VFR — Clear conditions, no delays expected
☀️ Morning Flight
Morning flights typically experience smoother conditions as the atmosphere is more stable and thermal turbulence hasn't yet developed.
Weather conditions can change. Check again before your flight.
Wide-Body Aircraft (Large)
Large, twin-aisle aircraft like this generally provide the smoothest ride through turbulence due to their size, weight, and advanced stabilization systems.
Looking for more detailed analysis?
Data Sources & Our Approach
ZeroTurb's Custom Algorithm: We've developed a proprietary
ZeroTurb Index (ZTI) algorithm that combines three meteorological indices weighted by their
predictive accuracy. This gives 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.
How accurate are turbulence alerts? Alerts are based on updated forecast models and pilot reports, and can change as departure approaches.