Your Flight
We analysed more than 15,000 data points along your route from London Heathrow Airport, London to Salt Lake City International Airport, Salt Lake City.
Delta Air Lines
LHR
SLC
DL51
Delta Air Lines · Live forecast
LHR
→
SLC
79
Calm Score
"Mostly smooth — one short bumpy section you'll handle."
10h 25m
Duration
4,217 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 → SLC
15 pilot reports along this route
15 / 15
Reporting smooth
0 / 15
Light turbulence
0
Moderate or worse
Latest pilot reports
Smooth
ARP UAL123 5522N01144W 0810 F380 BILTO 0829 5700N02000W MS55 262/98 KT N24980 QXS BLY 270810 L09A
4m ago
Smooth
ARP ICE856 6305N04319W 0810 F370 6329N04000W 0822 6359N03001W MS57 322/37 KT TFICT QXS UAK 270810 F70A
4m ago
Smooth
ARP RJA271 6118N04610W 0806 F360 6000N05000W 0823 AVUTI MS54 315/32 KT JYRBC QXS UAK 270806 L51A
8m ago
Smooth
ARP ETD93C 6323N04119W 0805 F360 6201N05001W 0837 6029N05801W MS54 329/46 KT A6BNE QXT AME 270805 L45A
9m ago
Smooth
ARP ICE648 6138N04204W 0803 F380 6158N03959W 0811 6258N02959W MS57 349/43 KT TFICV QXS UAK 270803 F67A
11m ago
AI-powered flight briefing
15,000 data points analyzed
· HIGH confidence
Your Journey Beta
15 minutes, 4 hours 35 minutes, and 4 hours 45 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 56 knots. These winds may delay arrival by up to 46 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 10h 25min
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
3:30-4:00
Light
4:00-4:30
Light
4:30-5:00
Moderate
5:00-5:30
Light
5:30-6:00
Light
6:00-6:30
Light
6:30-7:00
Light
7:00-7:30
Light
7:30-7:59
Light
7:59-8:28
Light
8:28-8:57
Light
8:57-9:26
Moderate
9:26-9:55
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
SLC
Salt Lake City International Airport — Arrival
Wind
8 kt (320°)
Sky
Broken
Temperature
33°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.