Your Flight
We analysed more than 5,500 data points along your route from San Diego International Airport, San Diego to Nashville International, Nashville.
Southwest Airlines
SAN
BNA
WN4346
Southwest Airlines · Live forecast
SAN
→
BNA
81
Calm Score
"A smooth ride ahead — sit back and enjoy."
10h 55m
Duration
1,519 nm
Distance
35,000 ft
Cruise Altitude
HIGH
Confidence
Turbulence comfort along route
Comfort score combines turbulence probability with intensity — higher means rougher
Smooth
Light
Moderate
Severe
Set an alert before your flight
Beta
You still have 13 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 SAN → BNA
5 pilot reports along this route
4 / 5
Reporting smooth
1 / 5
Light turbulence
0
Moderate or worse
Latest pilot reports
Smooth
MEM UA /OV MEM300010/TM 0910/FL049/TP B763/SK BKN049/RM DURC
10m ago
Light
BWG UA /OV BWG270040/TM 0859/FL320/TP B763/TB CONS LGT CHOP/RM SMOOTH AT FL340. ZME 62
21m ago
Smooth
BNA UA /OV BNA180010/TM 0857/FL430/TP C56X/TB NEG CHOP/RM SMOOTH RIDE. ZME 62
23m ago
Smooth
OKC UA /OV 15 SOUTH OKC/TM 0840/FL040/TP B737/TB SMOOTH RIDE FROM 100 TO 040 WITH MOD CHOP STARTING AT 040
40m ago
Smooth
MEM UA /OV MEM030010/TM 0835/FL036/TP B77L/SK BKN036/RM DURC
45m ago
AI-powered flight briefing
5,500 data points analyzed
· HIGH confidence
Your Journey Beta
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 across the Sonoran Desert, 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 calm conditions around the airport.
Winds Aloft
Winds at cruising altitude are about 76 knots. These winds are favorable and may get you there up to 11 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
Flight Timeline 10h 55min
Maximum turbulence expected per segment
Takeoff
Smooth
0:30-1:00
Light
1:00-1:30
Smooth
1:30-2:00
Light
2:00-2:30
Moderate
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
Light
6:30-7:00
Light
7:00-7:30
Light
7:30-8:00
Light
8:00-8:29
Light
8:29-8:58
Light
8:58-9:27
Moderate
9:27-9:56
Moderate
9:56-10:25
Light
Landing
Light
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
SAN
San Diego International Airport — Departure
Wind
9 kt (300°)
Sky
Scattered
Temperature
15°C
Conditions
VFR — Clear conditions, no delays expected
BNA
Nashville International — Arrival
Visibility
6 mi
Wind
8 kt G24 (300°)
Sky
Scattered
Temperature
5°C
Conditions
MVFR — Reduced visibility, minor delays possible
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
b738
Category
Narrow-Body Aircraft
Size
Medium
Comfort
Single-aisle mainline jets like this offer a comfortable ride. While you may feel turbulence more than on wide-body aircraft, they are engineered to handle it smoothly.
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.