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
This flight has already departed.
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
10 pilot reports along this route
10 / 10
Reporting smooth
0 / 10
Light turbulence
0
Moderate or worse
Latest pilot reports
Smooth
ARP N17XF 6012N02047W 0936 F430 6000N02000W 0939 ADODO MS41 248/17 KT N17XF DDL VEY 270936 A13A
1m ago
Smooth
ARP TSC245 6005N02218W 0933 F330 6001N03000W 1005 5801N04001W MS41 237/34 KT CGOIM QXS RKV 270934 J51A
4m ago
Smooth
ARP THY67C 6411N03843W 0928 F360 6401N04001W 0933 6201N05001W MS52 324/50 KT TCLLD QXS AGM 270928 L70A
9m ago
Smooth
ARP WJA2 6101N02435W 0924 F380 5959N02001W 0941 GOMUP MS38 293/15 KT CGUDH QXS KEF 270924 L09A
13m ago
Smooth
ARP UAL37 5712N01049W 0923 F360 5900N02000W 1011 6000N03000W MS51 264/99 KT N14102 DDL SYY 270923 F92A
14m 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
16°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.