Your Flight
We analysed more than 5,000 data points along your route from Hartsfield-Jackson Atlanta International, Atlanta to Juan Santamaría International Airport, San José (Alajuela).
Delta Air Lines
ATL
SJO
DL1931
Delta Air Lines · Live forecast
ATL
→
SJO
81
Calm Score
"A smooth ride ahead — sit back and enjoy."
1h 51m
Duration
1,420 nm
Distance
35,000 ft
Cruise Altitude
VERY HIGH
Confidence
Turbulence comfort along route
Comfort score combines turbulence probability with intensity — higher means rougher
Smooth
Light
Moderate
Severe
Set an alert before your flight
Beta
You still have 9 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 ATL → SJO
8 pilot reports along this route
2 / 8
Reporting smooth
2 / 8
Light turbulence
4
Moderate or worse
Latest pilot reports
Severe
TLH UUA /OV TLH360070/TM 1350/FL430/TP LJ60/TB SEV CAT
10m ago
Smooth
BKV UA /OV HINQE/TM 1350/FL015/TP SF50/RM TOPS OVC016 BASES OVC008 ON FINAL RWY 21
10m ago
Light
ATL UA /OV DBN325020/TM 1349/FL300/TP E35L/TB LGT MOD/RM ZTLFD 20
11m ago
Severe
ATL UUA /OV EUF160030/TM 1349/FL430/TP LJ60/TB SEV/RM -200FT +20KTS NO DMG NO INJURIES ZTLFD 12
11m ago
Smooth
RYY UA /OV RYY090003/TM 1439/FLDURD/TP C56X/SK OVC019
15m ago
AI-powered flight briefing
5,000 data points analyzed
· VERY HIGH confidence
Your Journey Beta
Some bumpy patches are scattered throughout the flight. Keep your seatbelt fastened when seated.
Your route takes you over the Appalachian Mountains, crossing the Gulf of Mexico, and crossing the Caribbean Sea – 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 a bit bumpy initially, with calm conditions around the airport.
Winds Aloft
Winds at cruising altitude are about 60 knots. These winds may delay arrival by up to 13 minutes.
Landing
Landing should feel smooth 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 1h 51min
Maximum turbulence expected per segment
Takeoff
Moderate
0:20-0:44
Light
0:44-1:08
Light
1:08-1:31
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
ATL
Hartsfield-Jackson Atlanta International — Departure
Wind
19 kt G30 (300°)
Sky
Broken
Temperature
11°C
Conditions
MVFR — Reduced visibility, minor delays possible
SJO
Juan Santamaría International Airport — Arrival
Wind
8 kt (100°)
Sky
Few
Temperature
22°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.