Your Flight
We analysed more than 8,500 data points along your route from Logan International, Boston to San Francisco International Airport, San Francisco.
BOS
Logan International
✈
SFO
San Francisco International Airport
Route Information
Departure
BOS (BOS)
Distance
4,339.9 km (2,343.4 nautical miles)
Arrival
SFO (SFO)
Flight Time
399 minutes (6h 39m)
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
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 BOS → SFO
7 pilot reports along this route
3 / 7
Reporting smooth
3 / 7
Light turbulence
1
Moderate or worse
Latest pilot reports
Smooth
OGD UA /OV OGD120007/TM 2356/FL410/TP C700/TB LGT-MOD /ZLC
14m ago
Light
BAF UA /OV BAF164019/TM 2353/FL190/TP P46T/TB OCNL LGT CHOP
17m ago
Smooth
CYS UA /OV CYS/TM 2352/FL200/TP SW4/SK TOP 300/TB NEG/RM ZDVWC
18m ago
Smooth
LWM UA /OV LWM/TM 2341/FL187/TP E75S/TB NEG/RM SMOOTH DURC HYLND SID
29m ago
Smooth
PWM UA /OV PWM/TM 2340/FL004/TP C208/SK BASES 004 DURD ILS 11
30m ago
AI-powered flight briefing
8,500 data points analyzed
· HIGH confidence
Your Journey Beta
2 hours 20 minutes and 3 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 Appalachian Mountains, over the Rocky Mountains, and over the Sierra Nevada – these areas can sometimes cause turbulence.
Mostly Smooth
Overall conditions look mostly smooth with occasional light bumps. Nothing to worry about.
Takeoff
Takeoff should feel smooth with possible light bumps, with calm conditions around the airport.
Winds Aloft
Winds at cruising altitude are about 56 knots. These winds may delay arrival by up to 32 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 6h 39min
Maximum turbulence expected per segment
Takeoff
Light
0:30-0:59
Light
0:59-1:28
Light
1:28-1:57
Light
1:57-2:25
Moderate
2:25-2:53
Light
2:53-3:21
Light
3:21-3:49
Moderate
3:49-4:17
Light
4:17-4:45
Light
4:45-5:13
Light
5:13-5:41
Light
5:41-6:09
Moderate
Landing
Moderate
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
BOS
Logan International - Departure
Wind
10 kt G20 (170°)
Sky
Scattered
Temperature
24°C
Conditions
VFR - Clear conditions, no delays expected
SFO
San Francisco International Airport - Arrival
Wind
15 kt G25 (280°)
Sky
Few
Temperature
21°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:
- 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.