KORD KSFO

Chicago O'Hare International Airport San Francisco International Airport
Route Information
Departure

KORD (ORD)

Distance

2,963.9 km (1,600.4 nautical miles)

Arrival

KSFO (SFO)

Flight Time

287 minutes (4h 47m)

Flight Profile

Cruise Altitude: 36,000 ft (Flight Level 360)

Route calculated using great circle navigation

Turbulence Comfort Along Route Comfort View
Comfort Score: Combines turbulence probability (GTG forecast) with intensity (ZTI analysis). High scores indicate both high probability AND high intensity turbulence.
Smooth
Comfortable
Noticeable
Uncomfortable
Formula: (Probability × Intensity)
Flight Smoothness Score
8.3 /10
Smoothness
Smooth Flight
31%
Smooth
69%
Light
AI-Powered Flight Briefing
📊 6,000 data points analyzed
Advanced AI-Powered Flight Briefing
Your Flight

We analysed more than 6,000 data points along your route from Chicago O'Hare International Airport, Chicago to San Francisco International Airport, San Francisco.

Your Journey Beta

Your route takes you over the Rocky Mountains and over the Sierra Nevada – 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 smooth with possible light bumps, with calm conditions around the airport.

Winds Aloft

Winds at cruising altitude are about 56 knots.

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
Live data from ECMWF global forecast models • 12 atmospheric pressure levels analyzed • Updated every 6 hours
Most Common
LIGHT
69% of your flight
Peak Intensity
LIGHT
Normal flight conditions
Route Breakdown (61 zones)
Light
42 zones (69%)
Smooth
19 zones (31%)
Forecast Valid: Jan 17, 06:00 UTC (Generated: Jan 17, 06:00 UTC)
Flight Timeline 4h 47min
Maximum turbulence expected per segment
Takeoff
Light
0:30-0:59
Smooth
0:59-1:28
Light
1:28-1:57
Light
1:57-2:25
Light
2:25-2:53
Light
2:53-3:21
Light
3:21-3:49
Light
3:49-4:17
Light
Landing
Light
Smooth
Light
Moderate
Severe
Longer bars indicate higher turbulence intensity. Values shown are the maximum for each time segment.
Turbulence Metrics ZTI and EDR
Comparing Two Turbulence Metrics:
  • ZTI (ZeroTurb Index): Our proprietary composite metric (0.0-1.0 scale)
  • EDR (Eddy Dissipation Rate): ICAO/WMO official standard (m^(2/3)/s scale)
ZTI Scale (Custom)
Smooth
<0.2
Light
0.2-0.5
Moderate
0.5-0.75
Severe
>0.75
EDR Scale (ICAO)
Smooth
<0.1
Light
0.1-0.4
Moderate
0.4-0.7
Severe
>0.7

Detailed Analysis Below: While flights generally follow these patterns, our advanced turbulence prediction system analyzes real-time weather data, atmospheric conditions, and pilot reports to provide you with precise, route-specific forecasts. Review the detailed metrics and interactive maps below for a comprehensive understanding of expected conditions along your flight path.

Narrow-Body Aircraft (Medium)

Single-aisle mainline jets like this offer a comfortable ride. While you may feel turbulence more than on wide-body aircraft, they are engineered to handle it smoothly.

Safety First: All commercial aircraft, regardless of size, are engineered and certified to safely handle turbulence. The difference is primarily in passenger comfort - larger aircraft provide a smoother feeling ride, but all aircraft are equally safe.

Important: Aircraft information is based on historical flight data and may not reflect the current assignment. Airlines may change aircraft types based on operational needs. Always verify with your airline for the most current aircraft information.
Learn more about aircraft size and comfort
Technical Forecast Details Advanced Analysis

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Comprehensive Flight Profile Altitude • Wind • Turbulence

Flight Altitude Profile
  • X-axis: Distance along route (km)
  • Y-axis (left): Aircraft altitude (feet)
  • Blue = Climb phase
  • Green = Cruise phase
  • Orange = Descent phase
Pilot Reports (PIREPs)

Real turbulence reports from pilots who recently flew near your route:

  • Green = Smooth (no turbulence)
  • Yellow = Light turbulence
  • Orange = Moderate turbulence
  • Red = Severe turbulence
Wind Speed
  • Y-axis (right): Wind speed in knots
  • Sudden wind changes often indicate turbulence
  • Hover over points to see wind direction
AI Comfort Forecast
  • Y-axis (right): Comfort Score (0-70)
  • <1 = Smooth (cyan)
  • 1-25 = Light (green)
  • 25-50 = Moderate (orange)
  • >50 = Severe (red)
Tip: Look for areas where multiple indicators coincide (e.g., pilot reports + AI forecast + wind changes) to identify the most likely turbulence zones.
Global Winds Forecast ECMWF Open Data Worldwide Coverage
Route-Specific Forecast: Wind data calculated at 61 waypoints along your flight path using high-resolution ECMWF global weather model (0.25° grid, ~25km resolution).
Minimum Winds
8 kt
9 mph
Average Winds
56 kt
64 mph
Maximum Winds
95 kt
109 mph
Valid: Jan 17, 12:00 UTC
Source: European Centre for Medium-Range Weather Forecasts
Flight Planning: Headwinds increase flight time and fuel consumption. Tailwinds decrease both. Strong crosswinds may affect takeoff/landing at airports.
Wind Impact Analysis GOOD
Wind Assessment: Light headwinds (4 kt avg) will have minimal impact on flight time. Moderate crosswinds averaging 46 kt - normal for cruise altitude
Route Wind Breakdown
Tailwinds
6 zones (10%)
Headwinds
16 zones (26%)
Crosswinds
38 zones (62%)
Minimal headwinds/tailwinds - typical flight time expected
Flight Time Impact
4 kt
Avg Headwind
+2 min
Time Impact
Slower than normal
Wind Range:
• Max Tailwind: 35 kt
• Max Headwind: 46 kt
• Max Crosswind: 93 kt
Wind Speed Along Route ECMWF Forecast
ZeroTurb Index (ZTI) Analysis Custom Algorithm
What is ZTI? Our proprietary ZeroTurb Index combines three meteorological indicators to give you a comprehensive turbulence probability (0.0-1.0 scale). The chart below shows how each component contributes to the overall ZTI along your route:
  • Richardson Number (Ri): Atmospheric stability - lower values indicate CAT risk
  • Wind Shear Index (WSI): Rate of wind speed/direction changes
  • Temperature Gradient Index (TGI): Frontal boundary strength
  • ZTI (Composite): Proprietary composite of the three indices above
ZTI Thresholds: Smooth: 0.0-0.2 Light: 0.2-0.5 Moderate: 0.5-0.75 Severe: 0.75-1.0
Scientific GTG Analysis NOAA Standards
For Aviation Professionals: This section shows turbulence zones using conservative NOAA GTG thresholds. These scientific thresholds are more cautious than the user-friendly "Comfort View" above, which better represents typical passenger experience.

Note: Modern aircraft are designed to handle moderate turbulence effortlessly. What scientific models classify as "moderate" often goes unnoticed by passengers due to advanced flight control systems and aircraft structural design. Most commercial flights encounter some level of atmospheric turbulence that the aircraft manages automatically.
Zone Distribution (Scientific Thresholds)
13%
Smooth (<15%)
8 zones
18%
Light (15-30%)
11 zones
67%
Moderate (30-50%)
41 zones
2%
Severe (≥50% prob)
1 zones
Threshold Comparison
Category Comfort View Scientific (NOAA)
Smooth <20% probability <15% probability
Light 20-50% 15-30%
Moderate 50-75% 30-50%
Severe ≥75% ≥50%
Turbulence Probability Along Route GTG Forecast
Low (0-30%)
Light or no turbulence
Medium (30-50%)
Moderate turbulence likely
High (50-70%)
Moderate-severe expected
Extreme (70-100%)
Severe turbulence
Active Turbulence Warnings (AIRSIGMETs) Loading...
Pilot Reports (PIREPs) - 6 Reports
What are PIREPs? Pilot Reports (PIREPs) are real-time observations from pilots flying the route. They provide the most accurate turbulence information available.
Time (UTC) Intensity Altitude Aircraft Report
Airport Forecasts (TAF) - Next 24-30 Hours
Departure: KORD
Valid: Jan 17 11:00 - Jan 18 12:00 UTC
11:00 - 20:00 UTC
Wind: 260° at 14 kt gusting to 24 kt
Visibility: 6+ SM
Clouds: SCT 2500 ft
TEMPO 16:00 - 20:00 UTC
Visibility: 6+ SM
Weather: -SN
Clouds: BKN 2500 ft
FM 20:00 - 05:00 UTC
Wind: 250° at 13 kt gusting to 21 kt
Visibility: 4 SM
Weather: -SN BR
Clouds: OVC 2500 ft
TEMPO 22:00 - 02:00 UTC
Visibility: 2 SM
Weather: -SN BR
Clouds: OVC 2000 ft
FM 05:00 - 12:00 UTC
Wind: 270° at 14 kt gusting to 24 kt
Visibility: 6+ SM
Weather: -SN
Clouds: OVC 2000 ft
Raw TAF: 
TAF KORD 171040Z 1711/1812 26014G24KT P6SM SCT025 TEMPO 1716/1720 P6SM -SN BKN025 FM172000 25013G21KT 4SM -SN BR OVC025 TEMPO 1722/1802 2SM -SN BR OVC020 FM180500 27014G24KT P6SM -SN OVC020
Arrival: KSFO
Forecast Valid: Jan 17 06:00 - Jan 18 12:00 UTC
06:00 - 10:00 UTC
Visibility: 6+
Clouds: SKC
06:00 - 10:00 UTC
Visibility: 6+
Clouds: SKC
06:00 - 10:00 UTC
Visibility: 6+
Clouds: SKC
FM 10:00 - 21:00 UTC
Wind: 40° at 6 kt
Visibility: 6
Weather: BR
Clouds: FEW at 500 ft
FM 10:00 - 21:00 UTC
Wind: 40° at 6 kt
Visibility: 6
Weather: BR
Clouds: FEW at 500 ft
FM 10:00 - 21:00 UTC
Wind: 40° at 6 kt
Visibility: 6
Weather: BR
Clouds: FEW at 500 ft
FM 21:00 - 00:00 UTC
Wind: 50° at 6 kt
Visibility: 6+
Clouds: SKC
FM 21:00 - 00:00 UTC
Wind: 50° at 6 kt
Visibility: 6+
Clouds: SKC
FM 21:00 - 00:00 UTC
Wind: 50° at 6 kt
Visibility: 6+
Clouds: SKC
FM 00:00 - 08:00 UTC
Wind: 320° at 5 kt
Visibility: 6+
Clouds: SKC
FM 00:00 - 08:00 UTC
Wind: 320° at 5 kt
Visibility: 6+
Clouds: SKC
FM 00:00 - 08:00 UTC
Wind: 320° at 5 kt
Visibility: 6+
Clouds: SKC
FM 08:00 - 12:00 UTC
Wind: 30° at 4 kt
Visibility: 6+
Clouds: SKC
FM 08:00 - 12:00 UTC
Wind: 30° at 4 kt
Visibility: 6+
Clouds: SKC
FM 08:00 - 12:00 UTC
Wind: 30° at 4 kt
Visibility: 6+
Clouds: SKC
Raw TAF: 
TAF KSFO 170524Z 1706/1812 VRB03KT P6SM SKC FM171000 04006KT 6SM BR FEW005 FM172100 05006KT P6SM SKC FM180000 32005KT P6SM SKC FM180800 03004KT P6SM SKC
About TAF: Terminal Area Forecasts (TAF) provide detailed 24-30 hour weather forecasts for airports, including wind, visibility, cloud ceiling, and weather phenomena. Updated every 6 hours by NOAA Aviation Weather Center.
Current Airport Weather (METAR)
Departure: KORD
Temperature: -9°C (16°F) | Dewpoint: -17°C
Wind: 260° at 15 kt gusting to 24 kt
Sky: FEW5000 SCT11000 (Base: 5000 ft)
Flight Category: VFR
Altimeter: 1008.50 inHg (1010 mb)
Observed: Jan 17 09:51 UTC
Raw METAR: 
METAR KORD 170951Z 26015G24KT 10SM FEW050 SCT110 M09/M17 A2978 RMK AO2 SLP095 T10941167 $
Arrival: KSFO
Temperature: 9°C (48°F) | Dewpoint: 6°C
Wind: 80° at 3 kt
Sky: CLR
Flight Category: VFR
Altimeter: 1019.40 inHg (1019 mb)
Observed: Jan 17 09:56 UTC
Raw METAR: 
METAR KSFO 170956Z 08003KT 10SM CLR 09/06 A3010 RMK AO2 SLP193 T00890056
About METAR: Meteorological Aerodrome Reports (METAR) provide current weather observations from airports, including temperature, wind, visibility, clouds, and atmospheric pressure. Updated hourly by NOAA Aviation Weather Center. Flight Categories: VFR (Good), MVFR (Marginal), IFR (Instrument Flight Rules), LIFR (Low Instrument Flight Rules).
Route Segment Analysis

The route has been divided into segments of approximately 500km each for detailed analysis.

Route Map With GTG Forecast Overlay
Data Sources & Our Approach
ZeroTurb's Custom Algorithm: Unlike generic turbulence forecasts, we've developed a proprietary ZeroTurb Index (ZTI) algorithm that combines three meteorological indices weighted by their predictive accuracy. This gives you transparent, passenger-focused turbulence probability (0.0-1.0 scale) instead of vague categories. Our approach processes raw ECMWF atmospheric data through custom calculations to detect Clear-Air Turbulence (CAT), wind shear zones, and frontal boundaries that cause bumpy rides.

This forecast integrates data from:

Disclaimer: This forecast is for informational purposes only. Always consult official aviation weather sources and follow ATC guidance.

How accurate are turbulence alerts? Alerts are based on updated forecast models and pilot reports, and can change as departure approaches.

Flight Insights & Recommendations

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