KUL
Kuala Lumpur International Airport
✈
SUB
Juanda International Airport
Distance
900 nm
Altitude
35,000 ft
Est. Duration
2h 43m
Route Information
Departure

KUL (KUL)

Distance

1,666.8 km (900.0 nautical miles)

Arrival

SUB (SUB)

Estimated Flight Time

163 minutes (2h 43m)

Flight Profile

Cruise Altitude: 35,000 ft (Flight Level 350)

Route calculated using great circle navigation

Turbulence comfort along route
Comfort score combines turbulence probability with intensity, higher means rougher
Smooth Light Moderate Severe
💙
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.
AI-powered flight briefing
3,500 data points analyzed · HIGH confidence
Your Flight

We analysed more than 3,500 data points along your route from Kuala Lumpur International Airport, Sepang to Juanda International Airport, Surabaya.

Your Journey Beta

38 minutes and 1 hour 40 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 Strait of Malacca and crossing the South China Sea – 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 smooth with possible light bumps, with calm conditions around the airport.

Winds Aloft

Winds at cruising altitude are about 27 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
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 2h 43min
Maximum turbulence expected per segment
Takeoff
Light
0:20-0:45
Moderate
0:45-1:10
Light
1:10-1:35
Light
1:35-1:59
Moderate
1:59-2:23
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
KUL Kuala Lumpur International Airport - Departure
Wind
6 kt (140°)
Sky
Few
Temperature
29°C
Conditions
VFR - Clear conditions, no delays expected
SUB Juanda International Airport - Arrival
Visibility
5 mi
Wind
10 kt (90°)
Sky
Few
Temperature
27°C
Conditions
MVFR - Reduced visibility, minor delays possible
Your flight details
Departure timing and aircraft information
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 KUL → SUB through soft clouds, nothing to crash into.