Your Flight
We analysed more than 11,000 data points along your route from Philadelphia International Airport, Philadelphia to Lisbon Humberto Delgado Airport, Lisbon.
American Airlines
PHL
LIS
AA258
American Airlines · Live forecast
PHL
→
LIS
84
Calm Score
"A smooth ride ahead — sit back and enjoy."
10h 55m
Duration
2,997 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
Set an alert before your flight
Beta
You still have 19 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 PHL → LIS
15 pilot reports along this route
15 / 15
Reporting smooth
0 / 15
Light turbulence
0
Moderate or worse
Latest pilot reports
Smooth
ARP AFR031 4536N05130W 0205 F400 4558N04959W 0212 4658N03959W MS53 296/95 KT FHUVS QXS YYT 160205 J03A
7m ago
Smooth
ARP UAL946 4542N05113W 0204 F370 4600N05000W 0210 4700N04000W MS51 295/113 KT N643UA QXS YYT 160204 F70A
8m ago
Smooth
ARP UAL918 4542N05115W 0203 F380 4600N05000W 0209 4700N04000W MS51 297/100 KT N78003 DDL YYT 160203 F43A
9m ago
Smooth
ARP AAL718 4552N05030W 0203 F390 4600N05000W 0205 4700N04000W MS50 293/87 KT N886BR DDL YYT 160203 L94A
9m ago
Smooth
ARP DAL66 4432N05844W 0202 F370 PORTI 0238 4700N05000W MS63 286/100 KT N414DZ DDL YHZ 160202 J23A
10m ago
AI-powered flight briefing
11,000 data points analyzed
· HIGH confidence
Your Journey Beta
1 hour, 1 hour 35 minutes, and 2 hours 20 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 Appalachian Mountains and crossing the North Atlantic Ocean – these areas 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 70 knots. These winds are favorable and may get you there up to 45 minutes early.
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
Flight Timeline 10h 55min
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
Moderate
2:30-3:00
Light
3:00-3:30
Light
3:30-4:00
Smooth
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
Light
9:27-9:56
Smooth
9:56-10:25
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
PHL
Philadelphia International Airport — Departure
Wind
14 kt G25 (180°)
Sky
Overcast
Temperature
10°C
Conditions
VFR — Clear conditions, no delays expected
LIS
Lisbon Humberto Delgado Airport — Arrival
Wind
7 kt (60°)
Sky
NSC
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
Today
b788
Category
Wide-Body Aircraft
Size
Large
Comfort
Large, twin-aisle aircraft like this generally provide the smoothest ride through turbulence due to their size, weight, and advanced stabilization systems.
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.