Delta Air Lines LHR SLC DL51
Delta Air Lines · Live forecast
LHR → SLC
DL51 · Aug 17, 2026 · 10:55 BS
86
Calm Score
"A smooth ride ahead - sit back and enjoy."
10h 25m
Duration
4,217 nm
Distance
40,000 ft
Cruise Altitude
VERY LOW
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 → SLC
15 pilot reports along this route
15 / 15
Reporting smooth
0 / 15
Light turbulence
0
Moderate or worse
Latest pilot reports
Smooth
ARP LOT4 6236N04223W 0836 F390 6259N04000W 0844 6359N03000W MS45 326/28 KT SPLSG DDL XXH 170836 L78A
3m ago
Smooth
ARP ETD1 6150N02511W 0834 F380 6130N03000W 0851 6000N04000W MS49 198/42 KT A6XWE QXS KEF 170834 J05A
5m ago
Smooth
ARP BAW2X 6050N04443W 0834 F390 6030N04000W 0850 5930N03000W MS44 201/21 KT GXLEL DDL UAK 170834 J62A
5m ago
Smooth
ARP WJA2 6036N02506W 0833 F390 5959N02001W 0851 ERAKA MS44 325/48 KT CGUDH QXS RKV 170833 L69A
6m ago
Smooth
ARP DLH489 6051N02900W 0833 F410 5928N02001W 0906 GOMUP MS42 188/28 KT DAIXT DDL KEF 170833 J86A
6m ago
AI-powered flight briefing
15,000 data points analyzed
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.

Your Journey Beta

1 hour, 2 hours, and 2 hours 10 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 58 knots. These winds may delay arrival by up to 64 minutes.

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 10h 25min
Maximum turbulence expected per segment
Takeoff
Moderate
0:30-1:00
Light
1:00-1:30
Moderate
1:30-2:00
Moderate
2:00-2:30
Moderate
2:30-3:00
Light
3:00-3:30
Light
3:30-4:00
Smooth
4:00-4:30
Light
4:30-5:00
Light
5:00-5:30
Light
5:30-6:00
Light
6:00-6:30
Smooth
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
Light
9:26-9:55
Smooth
Landing
Smooth
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
21°C
Conditions
VFR - Clear conditions, no delays expected
SLC Salt Lake City International Airport - Arrival
Wind
6 kt (300°)
Sky
Scattered
Temperature
24°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 → SLC through soft clouds, nothing to crash into.