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✈️ Hong Kong (HKG) ⇄ San Francisco (SFO): turbulence forecast

Checking whether your HKG–SFO flight will be bumpy? RideScore samples the live forecast winds at cruise altitude along the actual Hong Kong–San Francisco route and scores every leg of the flight, in plain English.

Live forecast HKG → SFO SFO → HKG
Distance11,128 km / 6,911 mi
Est. flight time~13h 36m
Time difference15h time behind at SFO
AirportsHong Kong Intl · San Francisco Intl

What makes this route bumpy (or not)

Part of this route runs through the tropics, where the main turbulence driver is convection — building storm clouds, especially in the afternoon and in the wet season. Crews routinely deviate around the buildups, so brief detours are normal.

How the forecast works

RideScore reads the same global weather models professionals use (NOAA GFS / ECMWF via Open-Meteo), computes wind shear, jet-stream strength and storm energy at up to 11 points along the HKG–SFO great-circle, and turns it into a simple 0–10 bumpiness score for each leg of your flight — plus recent pilot reports from aircraft that just flew nearby. It's free, with no account and no tracking, and works up to 16 days ahead.

Common questions

Is the HKG to SFO flight usually turbulent?
It varies day to day with the winds aloft. Part of this route runs through the tropics, where the main turbulence driver is convection — building storm clouds, especially in the afternoon and in the wet season. Crews routinely deviate around the buildups, so brief detours are normal. Check the live forecast on RideScore just before you fly — it samples the actual forecast winds along the Hong Kong–San Francisco route at cruise altitude.
How long is the flight from Hong Kong to San Francisco?
The great-circle distance is about 11,128 km (6,911 miles), which works out to roughly 13h 36m in the air depending on winds and routing.
Is turbulence on this route dangerous?
No — turbulence is uncomfortable, not dangerous to the aircraft. Modern jets are built for far worse than anything encountered in normal service, and pilots route around the roughest air. Keep your seatbelt fastened and it is a non-event.

More routes from Hong Kong (HKG) · More routes from San Francisco (SFO)

This page shows typical route characteristics; conditions on your day will differ — run the live forecast. Estimates only, not an aviation weather briefing. © 2026 RideScore · made with ❤️ in Amsterdam · About · Terms