Air Canada LHR YYZ AC855
Air Canada · Live forecast
LHR → YYZ
AC855 · Aug 17, 2026 · 12:05 BS
56
Calm Score
"Some bumps expected - keep your seatbelt fastened."
7h 35m
Duration
3,082 nm
Distance
40,000 ft
Cruise Altitude
HIGH
Confidence
Turbulence comfort along route
Comfort score combines turbulence probability with intensity, higher means rougher
Smooth Light Moderate Severe

Notifications not available
Your flight departs in less than 6 hours. The forecast is unlikely to change significantly at this point.

💙
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 they don't put the aircraft in danger. Many passengers feel exactly the same way.
Right now on your route
Live pilot reports from aircraft flying LHR → YYZ
15 pilot reports along this route
15 / 15
Reporting smooth
0 / 15
Light turbulence
0
Moderate or worse
Latest pilot reports
Smooth
ARP WJA36 5537N02224W 0758 F350 5600N02000W 0807 PIKIL MS45 228/87 KT CGWLK QXT IGW 170758 F02A
3m ago
Smooth
ARP DAL236 5501N01833W 0757 F390 RESNO 0811 NETKI MS57 230/81 KT N434DX DDL IG1 170757 J48A
4m ago
Smooth
ARP QTR87Q 5343N02148W 0757 F360 5400N02000W 0804 DOGAL MS45 221/96 KT A7ANS QXT EUA 170757 J57A
4m ago
Smooth
ARP UAL126 5340N02200W 0757 F380 5359N02000W 0804 5359N01500W MS51 220/107 KT N660UA DDL XXN 170757 F28A
4m ago
Smooth
ARP UAL230 5500N01905W 0756 F370 5459N01502W 0812 RESNO MS51 221/82 KT N17279 DDL X2E 170756 F48A
5m ago
AI-powered flight briefing
11,000 data points analyzed · HIGH confidence
Your Flight

We analysed more than 11,000 data points along your route from London Heathrow Airport, London to Toronto Lester B. Pearson International Airport, Toronto.

Your Journey Beta

Some bumpy patches are scattered throughout the flight. Keep your seatbelt fastened when seated.

Your route takes you crossing the North Atlantic Ocean and over the Appalachian Mountains – these areas can sometimes cause light turbulence.

Some Bumps Ahead

There are a couple of short sections with bumps, but nothing out of the ordinary. Turbulence can feel uncomfortable, but it is not dangerous. Aircraft are designed to handle it easily. Pilots often adjust altitude or route to find smoother air.

Takeoff

Takeoff should feel smooth, with calm conditions around the airport.

Winds Aloft

Standard wind conditions expected at cruising altitude.

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
Live data from ECMWF global forecast models · 12 atmospheric pressure levels · Updated every 6 hours
Flight Timeline 7h 35min
Maximum turbulence expected per segment
Takeoff
Moderate
0:30-0:59
Moderate
0:59-1:28
Moderate
1:28-1:57
Moderate
1:57-2:25
Moderate
2:25-2:53
Moderate
2:53-3:21
Moderate
3:21-3:49
Moderate
3:49-4:17
Smooth
4:17-4:45
Smooth
4:45-5:13
Moderate
5:13-5:41
Moderate
5:41-6:09
Moderate
6:09-6:37
Moderate
6:37-7:05
Moderate
Landing
Moderate
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
LHR London Heathrow Airport - Departure
Wind
9 kt (280°)
Sky
Scattered
Temperature
19°C
Conditions
VFR - Clear conditions, no delays expected
YYZ Toronto Lester B. Pearson International Airport - Arrival
Visibility
10+ mi
Wind
10 kt (350°)
Sky
Broken
Temperature
22°C
Conditions
VFR - Clear conditions, no delays expected
Your flight details
Departure timing and aircraft information
Morning Flight Departure
Time of day
Morning Flight
Tip
Morning flights typically experience smoother conditions as the atmosphere is more stable and thermal turbulence hasn't yet developed.
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:

Disclaimer: This forecast is for informational purposes only. Always consult official aviation weather sources and follow ATC guidance.

Fly this route, calmly Game · Beta A calming mini-game, not a forecast. Glide LHR → YYZ through soft clouds, nothing to crash into.