Delta Air Lines
SEA
SJC
DL4100
Delta Air Lines · Live forecast
SEA
→
SJC
100
Calm Score
"A smooth ride ahead — sit back and enjoy."
2h 13m
Duration
606 nm
Distance
31,000 ft
Cruise Altitude
HIGH
Confidence
Set an alert before your flight
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.
Airport conditions
Live weather at departure and arrival
SEA
Seattle–Tacoma International Airport — Departure
Wind
12 kt (210°)
Sky
Overcast
Temperature
6°C
Conditions
VFR — Clear conditions, no delays expected
SJC
Norman Y. Mineta San Jose International Airport — Arrival
Wind
3 kt (0°)
Sky
Scattered
Temperature
17°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.