Your Flight
We analysed more than 14,500 data points along your route from London Heathrow Airport, London to Denver International Airport, Denver.
United Airlines
LHR
DEN
UA26
United Airlines · Live forecast
LHR
→
DEN
77
Calm Score
"Mostly smooth — one short bumpy section you'll handle."
9h 40m
Duration
4,048 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 → DEN
15 pilot reports along this route
15 / 15
Reporting smooth
0 / 15
Light turbulence
0
Moderate or worse
Latest pilot reports
Smooth
ARP UAL71 5456N01114W 0923 F320 RESNO 0941 5600N02000W MS43 262/79 KT N225UA QXS BLY 270923 F28A
3m ago
Smooth
ARP AAL209 5533N01322W 0922 F380 PIKIL 0931 5700N02000W MS57 259/90 KT N818AL QXS BRR 270922 L58A
4m ago
Smooth
ARP SWR41G 6102N04051W 0922 F350 6100N04000W 0925 6000N03000W MS51 353/48 KT HBJNF DDL XXH 270922 F82A
4m ago
Smooth
ARP DAL71 5451N01325W 0921 F360 RESNO 0929 5600N02000W MS53 252/91 KT N518DZ DDL XXF 270921 J78A
5m ago
Smooth
ARP UAL945 5420N01141W 0921 F340 RESNO 0938 5601N02000W MS47 257/87 KT N13014 QXS BYT 270921 L20A
5m ago
AI-powered flight briefing
14,500 data points analyzed
· HIGH confidence
Your Journey Beta
3 hours, 4 hours 20 minutes, and 8 hours 30 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.
Mostly Smooth
Overall conditions look mostly smooth with occasional light bumps. Nothing to worry about.
Takeoff
Takeoff should feel a bit bumpy initially, with calm conditions around the airport.
Winds Aloft
Winds at cruising altitude are about 57 knots. These winds may delay arrival by up to 43 minutes.
Landing
Landing should feel smooth with possible light bumps 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 9h 40min
Maximum turbulence expected per segment
Takeoff
Moderate
0:30-0:59
Light
0:59-1:28
Light
1:28-1:57
Light
1:57-2:26
Light
2:26-2:55
Moderate
2:55-3:24
Light
3:24-3:53
Light
3:53-4:22
Moderate
4:22-4:51
Moderate
4:51-5:20
Light
5:20-5:49
Light
5:49-6:18
Light
6:18-6:47
Light
6:47-7:16
Light
7:16-7:45
Light
7:45-8:14
Light
8:14-8:42
Moderate
8:42-9:10
Light
Landing
Light
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
DEN
Denver International Airport — Arrival
Wind
10 kt (20°)
Sky
Broken
Temperature
27°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.