How long is flight QF128?

The HKG to SYD route is the basis for the schedule. View the full route forecast and typical duration on the Turbcast route page.

Flight QF128

QF128 Turbulence ForecastQantas · HKG → SYD

About flight QF128

Airline: Qantas (QF)
Route: HKG → SYD
Typical Aircraft: A332
Distance: 7,394 km
Duration: 9h 06m
Cruise Altitude: FL390

See today’s turbulence forecast

Qantas QF128 flies the tropical convective route from Hong Kong to Sydney. Conditions change hour to hour - view the live forecast for your departure date.

View live forecast

Check QF128 on a specific date

Turbulence on the HKG → SYD route

This is a short or low-latitude sector, so clear-air turbulence from upper-level jets is rare. At tropical latitudes, convective turbulence from thunderstorms is the main driver - pilots generally route around storm cells, but afternoon/evening flights encounter more build-up than morning departures. A large portion of the flight crosses open ocean (North Pacific), where upper-level conditions are generally smoother than over continental terrain.

Calmest season: Dry season. This corridor is most turbulent in the relevant hemisphere’s winter, when the jet stream is strongest and sits closer to the route. At tropical latitudes, convective (thunderstorm-driven) turbulence dominates during regional wet seasons and monsoon cycles, typically worst in the afternoon and evening.

Full HKG to SYD route guide

Frequently asked questions

Is QF128 usually a bumpy flight?

Qantas QF128 operates between HKG and SYD. Whether it’s bumpy depends on the day’s weather - Turbcast pulls live NOAA aviation-grade data so you can check the actual forecast for your departure date rather than relying on averages.

What aircraft does QF128 use?

QF128 is typically operated by the A332. Aircraft swaps happen - confirm with your booking before flying.

How long is the HKG to SYD flight?

Approximately 9h 06m direct, covering 7,394 km at a typical cruise of FL390.

When does QF128 have the smoothest weather?

Historically calmest during Dry season. Forecast accuracy improves as you get closer to departure - within 48 hours the NOAA WAFS model is at peak skill.