United Airlines IAH SFO UA3919
United Airlines · Live forecast
IAH → SFO
UA3919 · Mar 16, 2026 · 21:00 CD
Also sold as: UA2166 United Airlines
82
Calm Score
"A smooth ride ahead — sit back and enjoy."
4h 24m
Duration
1,419 nm
Distance
36,000 ft
Cruise Altitude
VERY HIGH
Confidence
Turbulence comfort along route
Comfort score combines turbulence probability with intensity — higher means rougher
Smooth Light Moderate Severe
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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 IAH → SFO
1 pilot report along this route
0 / 1
Reporting smooth
0 / 1
Light turbulence
1
Moderate or worse
Latest pilot reports
Moderate
ABQ UA /OV ABQ150030/TM 1510/FL270/TP B38M/TB MOD CHOP/RM ZAB FDCS
7m ago
AI-powered flight briefing
5,000 data points analyzed · VERY HIGH confidence
Your Flight

We analysed more than 5,000 data points along your route from George Bush Intercontinental Houston Airport, Houston to San Francisco International Airport, San Francisco.

Your Journey Beta

1 hour 25 minutes and 2 hours 45 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 – conditions there can sometimes cause light 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 69 knots. These winds may delay arrival by up to 23 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 4h 24min
Maximum turbulence expected per segment
Takeoff
Light
0:20-0:48
Light
0:48-1:16
Light
1:16-1:44
Moderate
1:44-2:12
Light
2:12-2:40
Light
2:40-3:08
Moderate
3:08-3:36
Light
3:36-4:04
Light
Landing
Smooth
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
IAH George Bush Intercontinental Houston Airport — Departure
Wind
10 kt G27 (350°)
Sky
Scattered
Temperature
8°C
Conditions
VFR — Clear conditions, no delays expected
SFO San Francisco International Airport — Arrival
Wind
5 kt (280°)
Sky
Clear
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
Tomorrow — conditions may change
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.