How long is flight CX845?

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

Flight CX845

CX845 Turbulence ForecastCathay Pacific · HKG → JFK

About flight CX845

Airline: Cathay Pacific (CX)
Route: HKG → JFK
Typical Aircraft: B777
Distance: 12,970 km
Duration: 15h 35m
Cruise Altitude: FL410

See today’s turbulence forecast

Cathay Pacific CX845 flies the ultra-long-haul corridor from Hong Kong to New York. Conditions change hour to hour - view the live forecast for your departure date.

View live forecast

Check CX845 on a specific date

Turbulence on the HKG → JFK route

The route crosses mid-latitudes where the polar jet can influence flight conditions, though exposure is shorter than on genuine long-haul crossings. A large portion of the flight crosses open ocean (North Pacific), where upper-level conditions are generally smoother than over continental terrain.

Calmest season: Late spring to early autumn (May-September). This corridor is most turbulent in the northern winter (Nov-Mar), when the jet stream is strongest and sits closer to the route.

Full HKG to JFK route guide

Frequently asked questions

Is CX845 usually a bumpy flight?

Cathay Pacific CX845 operates between HKG and JFK. 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 CX845 use?

CX845 is typically operated by the B777. Aircraft swaps happen - confirm with your booking before flying.

How long is the HKG to JFK flight?

Approximately 15h 35m direct, covering 12,970 km at a typical cruise of FL410.

When does CX845 have the smoothest weather?

Historically calmest during Late spring to early autumn (May-September). Forecast accuracy improves as you get closer to departure - within 48 hours the NOAA WAFS model is at peak skill.