Your Flight
We analysed more than 11,000 data points along your route from Toronto Lester B. Pearson International Airport, Toronto to London Heathrow Airport, London.
Air Canada
YYZ
LHR
AC856
Air Canada · Live forecast
YYZ
→
LHR
88
Calm Score
"A smooth ride ahead — sit back and enjoy."
7h 10m
Duration
3,082 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 20 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 YYZ → LHR
15 pilot reports along this route
15 / 15
Reporting smooth
0 / 15
Light turbulence
0
Moderate or worse
Latest pilot reports
Smooth
ARP THY2 5648N03230W 0409 F350 5658N03000W 0419 5658N02001W MS48 307/36 KT TCJJI QXT EUA 170409 F42A
5m ago
Smooth
ARP RCH574 5508N03500W 0408 F310 5600N03000W 0430 5600N02000W MS37 231/29 KT 40066A DDL XXN 170408 F49A
6m ago
Smooth
ARP RCH574 5503N03524W 0406 F310 5600N03000W 0430 5600N02000W MS37 221/27 KT 40066A DDL XXN 170407 F45A
8m ago
Smooth
ARP MEDVC4C 5504N02237W 0406 F410 5459N02000W 0417 5459N01500W MS59 311/27 KT HZMS4C DDL TRE 170406 A53A
8m ago
Smooth
ARP ELY001 5543N01314W 0405 F360 PIKIL 0413 5600N02000W MS54 321/7 KT 4XECB QXS BLY 170405 F24A
9m ago
AI-powered flight briefing
11,000 data points analyzed
· HIGH confidence
Your Journey Beta
4 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 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 39 knots. These winds are favorable and may get you there up to 12 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 7h 10min
Maximum turbulence expected per segment
Takeoff
Light
0:30-0:59
Light
0:59-1:28
Light
1:28-1:57
Light
1:57-2:26
Smooth
2:26-2:55
Light
2:55-3:24
Light
3:24-3:52
Light
3:52-4:20
Moderate
4:20-4:48
Light
4:48-5:16
Light
5:16-5:44
Smooth
5:44-6:12
Smooth
6:12-6:40
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
YYZ
Toronto Lester B. Pearson International Airport — Departure
Visibility
7 mi
Wind
8 kt (150°)
Sky
Few
Temperature
22°C
Conditions
VFR — Clear conditions, no delays expected
LHR
London Heathrow Airport — Arrival
Wind
5 kt (360°)
Sky
Broken
Temperature
16°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
Tomorrow — conditions may change
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.