United Airlines MEL SFO UA3909
United Airlines · Live forecast
MEL → SFO
UA3909 · Mar 16, 2026 · 13:15 AED
89
Calm Score
"A smooth ride ahead — sit back and enjoy."
38h 18m
Duration
6,832 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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💙
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 MEL → SFO
1 pilot report along this route
1 / 1
Reporting smooth
0 / 1
Light turbulence
0
Moderate or worse
Latest pilot reports
Smooth
ARP ATN3368 3628N 12656W 0450 F320 MS38 330/178KT
10m ago
AI-powered flight briefing
24,500 data points analyzed · HIGH confidence
Your Flight

We analysed more than 24,500 data points along your route from Melbourne Airport, Melbourne to San Francisco International Airport, San Francisco.

Your Journey Beta

45 minutes, 1 hour 40 minutes, and 2 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 Great Dividing Range, crossing the South Pacific Ocean, and crossing the North Pacific Ocean – 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 39 knots. These winds are favorable and may get you there up to 28 minutes early.

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
Live data from ECMWF global forecast models · 12 atmospheric pressure levels · Updated every 6 hours
Flight Timeline 38h 18min
Maximum turbulence expected per segment
Takeoff
Light
0:30-1:00
Moderate
1:00-1:30
Light
1:30-2:00
Moderate
2:00-2:30
Light
2:30-3:00
Light
3:00-3:30
Light
3:30-4:00
Light
4:00-4:30
Light
4:30-5:00
Light
5:00-5:30
Light
5:30-6:00
Light
6:00-6:30
Smooth
6:30-7:00
Light
7:00-7:30
Light
7:30-8:00
Smooth
8:00-8:30
Smooth
8:30-9:00
Light
9:00-9:30
Light
9:30-10:00
Light
10:00-10:30
Light
10:30-11:00
Smooth
11:00-11:30
Smooth
11:30-12:00
Smooth
12:00-12:30
Smooth
12:30-13:00
Smooth
13:00-13:30
Light
13:30-14:00
Smooth
14:00-14:30
Light
14:30-15:00
Smooth
15:00-15:30
Smooth
15:30-16:00
Smooth
16:00-16:30
Smooth
16:30-17:00
Light
17:00-17:30
Smooth
17:30-18:00
Smooth
18:00-18:30
Light
18:30-19:00
Light
19:00-19:30
Smooth
19:30-20:00
Smooth
20:00-20:30
Smooth
20:30-21:00
Smooth
21:00-21:30
Light
21:30-22:00
Smooth
22:00-22:30
Light
22:30-23:00
Smooth
23:00-23:30
Moderate
23:30-24:00
Moderate
24:00-24:30
Light
24:30-25:00
Smooth
25:00-25:30
Smooth
25:30-26:00
Smooth
26:00-26:30
Smooth
26:30-27:00
Light
27:00-27:30
Light
27:30-28:00
Light
28:00-28:30
Moderate
28:30-29:00
Light
29:00-29:30
Light
29:30-30:00
Light
30:00-30:30
Light
30:30-31:00
Light
31:00-31:30
Light
31:30-32:00
Moderate
32:00-32:29
Moderate
32:29-32:58
Light
32:58-33:27
Light
33:27-33:56
Light
33:56-34:25
Smooth
34:25-34:54
Light
34:54-35:23
Smooth
35:23-35:52
Light
35:52-36:21
Smooth
36:21-36:50
Smooth
36:50-37:19
Light
37:19-37:48
Smooth
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
MEL Melbourne Airport — Departure
Wind
3 kt (150°)
Sky
Broken
Temperature
19°C
Conditions
MVFR — Reduced visibility, minor delays possible
SFO San Francisco International Airport — Arrival
Wind
5 kt (280°)
Sky
Scattered
Temperature
18°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:

Disclaimer: This forecast is for informational purposes only. Always consult official aviation weather sources and follow ATC guidance.