Your Flight
We analysed more than 13,500 data points along your route from London Heathrow Airport, London to Calgary International Airport, Calgary.
Air Canada
LHR
YYC
AC851
Air Canada · Live forecast
LHR
→
YYC
82
Calm Score
"A smooth ride ahead — sit back and enjoy."
8h 50m
Duration
3,787 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 you'll be completely safe. 1 in 3 passengers feel exactly like you.
Right now on your route
Live pilot reports from aircraft flying LHR → YYC
6 pilot reports along this route
6 / 6
Reporting smooth
0 / 6
Light turbulence
0
Moderate or worse
Latest pilot reports
Smooth
ARP WGN461 6001N02034W 0811 F340 6000N02000W 0813 BALIX MS46 233/55 KT N781SN DDL IG1 270812 F04A
3m ago
Smooth
ARP CFG097 6050N02335W 0800 F410 6000N02000W 0815 ERAKA MS42 257/18 KT DANRN QXS KEF 270800 J10A
14m ago
Smooth
ARP UAL182 5742N01228W 0757 F390 ETILO 0806 EVNAL MS50 268/83 KT N22992 QXS BRR 270757 L40A
17m ago
Smooth
ARP ETD93C 6352N03719W 0751 F360 6331N04001W 0800 6201N05001W MS54 351/44 KT A6BNE QXS AGM 270751 L38A
23m ago
Smooth
ARP UAE88F 6225N02411W 0750 F400 6202N03001W 0810 6002N04002W MS41 342/8 KT A6EXQ DDL KEF 270750 J85A
24m ago
AI-powered flight briefing
13,500 data points analyzed
· HIGH confidence
Your Journey Beta
26 minutes and 8 hours 25 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 crossing the North Atlantic Ocean and over the Rocky Mountains – 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 42 knots. These winds may delay arrival by up to 26 minutes.
Landing
Landing should feel a bit bumpy on descent 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 8h 50min
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
3:30-3:59
Light
3:59-4:28
Light
4:28-4:57
Light
4:57-5:26
Light
5:26-5:55
Light
5:55-6:24
Light
6:24-6:53
Light
6:53-7:22
Light
7:22-7:51
Smooth
7:51-8:20
Light
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
10 kt (280°)
Sky
Scattered
Temperature
20°C
Conditions
VFR — Clear conditions, no delays expected
YYC
Calgary International Airport — Arrival
Visibility
10+ mi
Wind
10 kt (270°)
Sky
Few
Temperature
18°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:
- 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.