Your Flight
We analysed more than 6,500 data points along your route from San Francisco International Airport, San Francisco to Detroit Metropolitan Wayne County Airport, Detroit.
United Airlines
SFO
DTW
UA1904
United Airlines · Live forecast
SFO
→
DTW
40
Calm Score
"Some bumps expected — keep your seatbelt fastened."
4h 36m
Duration
1,802 nm
Distance
39,000 ft
Cruise Altitude
HIGH
Confidence
Turbulence comfort along route
Comfort score combines turbulence probability with intensity — higher means rougher
Smooth
Light
Moderate
Severe
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Beta
You still have 15 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 SFO → DTW
1 pilot report along this route
0 / 1
Reporting smooth
0 / 1
Light turbulence
1
Moderate or worse
Latest pilot reports
Moderate
DTW UA /OV KDTW035004/TM 0740/FL010/TP A320/SK BKN025/TB MOD CHOP/IC NEG
29m ago
AI-powered flight briefing
6,500 data points analyzed
· HIGH confidence
Your Journey Beta
16 minutes into the flight: Expect more intense turbulence. Keep your seatbelt fastened.
2 hours 30 minutes and 3 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 over the Sierra Nevada and over the Rocky Mountains – these areas can sometimes cause light turbulence.
Some Bumps Ahead
There are a couple of short sections with bumps, but nothing out of the ordinary. Turbulence can feel uncomfortable, but it is not dangerous. Aircraft are designed to handle it easily. Pilots often adjust altitude or route to find smoother air.
Takeoff
Takeoff should feel a bit bumpy initially, with calm conditions around the airport.
Winds Aloft
Standard wind conditions expected at cruising altitude.
Landing
Landing should feel expect some bumps on approach 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 4h 36min
Maximum turbulence expected per segment
Takeoff
Severe
0:30-0:57
Moderate
0:57-1:24
Moderate
1:24-1:51
Moderate
1:51-2:18
Moderate
2:18-2:45
Moderate
2:45-3:12
Moderate
3:12-3:39
Moderate
3:39-4:06
Moderate
Landing
Severe
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
SFO
San Francisco International Airport — Departure
Wind
11 kt (290°)
Sky
Clear
Temperature
16°C
Conditions
VFR — Clear conditions, no delays expected
DTW
Detroit Metropolitan Wayne County Airport — Arrival
Visibility
7 mi
Wind
22 kt G36 (270°)
Sky
Overcast
Temperature
13°C
Conditions
VFR — Clear conditions, no delays expected
Your flight details
Departure timing and aircraft information
Evening Flight Departure
Time of day
Evening Flight
Tip
Evening and night flights typically offer smoother conditions as thermal activity subsides and the atmosphere stabilizes after sunset.
When
Today
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.