Your Flight
We analysed more than 10,000 data points along your route from Logan International, Boston to Lisbon Humberto Delgado Airport, Lisbon.
Tap Air Portugal
BOS
LIS
TP218
Tap Air Portugal · Live forecast
BOS
→
LIS
83
Calm Score
"A smooth ride ahead — sit back and enjoy."
6h 30m
Duration
2,767 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 12 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 BOS → LIS
11 pilot reports along this route
8 / 11
Reporting smooth
2 / 11
Light turbulence
1
Moderate or worse
Latest pilot reports
Smooth
ARP BAW34N 4415N03924W 1029 F370 4730N03000W 1116 5100N02000W MS47 286/73 KT GXLEA DDL XXH 161030 J21A
7m ago
Moderate
BID UA /OV BID/TM 1023/FL300/TP A319/TB MOD
13m ago
Smooth
BOS UA /OV BOS135013/TM 1020/FL080/TP BCS3/SK TOPS 075 LAYER ABV/TB SMOOTH/RM LGT PRECIP DURC
16m ago
Light
BDL UA /OV BDL325030/TM 1014/FL110/TP BCS3/TB OCNL LGT CHOP 230-110/IC NEG/RM DURD ON STELA1 INTO BDL
22m ago
Smooth
PWM UA /OV PWM/TM 1011/FL014/TP E75S/SK BS 010 VARIABLE OFF RWY 11
25m ago
AI-powered flight briefing
10,000 data points analyzed
· HIGH confidence
Your Journey Beta
A brief bumpy patch may occur during cruise. It's nothing to worry about - just keep your seatbelt fastened.
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 a bit bumpy initially, with calm conditions around the airport.
Winds Aloft
Winds at cruising altitude are about 67 knots. These winds are favorable and may get you there up to 40 minutes early.
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 6h 30min
Maximum turbulence expected per segment
Takeoff
Moderate
0:30-1:00
Light
1:00-1:30
Light
1:30-2:00
Light
2:00-2:30
Light
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
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
BOS
Logan International — Departure
Wind
14 kt G25 (160°)
Sky
Overcast
Temperature
5°C
Conditions
MVFR — Reduced visibility, minor delays possible
LIS
Lisbon Humberto Delgado Airport — Arrival
Wind
7 kt (60°)
Sky
NSC
Temperature
15°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
a21n
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.