Cathay Pacific· Callsign CPA100 ·Daily

CX100 from Hong Kong to Sydney, tracked live

The premier Australian route Cathay has served since the era of its flying-boat and DC-4 pioneers.

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Status on this page means observed ADS-B activity inside available receiver coverage. Confirm official delay, cancellation, gate and booking status with Cathay Pacific.

HKG
Hong Kong
Hong Kong International Airport
09:20 HKT (UTC+8)
9h 05m
7,393 km · 4,594 mi
Non-stop
SYD
Sydney
Sydney Kingsford Smith Airport
20:25 AEDT (UTC+11)
Typical schedule · next departure Friday, October 30 · times shown in airport local time
Aircraft
Airbus A350-900
typical equipment
Distance
7,393 km
3,992 nautical miles
Heading
147°
tracks south-east
Clock change
+3 h
on arrival
Block speed
814 km/h
gate to gate average
Range used
49%
of the type's book range
Length rank
#154
of 439 tracked routes

Follow CX100 in real time

The aircraft appears below whenever it is airborne and inside receiver coverage. Its planned route is drawn between the two airports.

CX100 is not transmitting right now. It may be between rotations, on the ground, or out of receiver range - Check back near 09:20 at HKG. The full map has the rest of the sky, and what is flying over me will name whatever is above you instead.

CX100 at a glance

  • The trip: 7,393 km (4,594 miles) from Hong Kong to Sydney, flying south-east.
  • How long: 9h 05m gate to gate. That is about 814 km/h on average, taxi time included.
  • Your watch: set it 3 hours forward on arrival.
  • Window seat tip: the right (south-facing) side gets the sun on a daytime flight.
  • The plane: usually an Airbus A350-900. This route uses about 49% of how far it can fly.
  • When it goes: out of HKG in mid-morning, into SYD in late evening.

CX100 route overview: HKG to SYD

CX100 distance and great-circle path

CX100 covers 7,393 km, or 4,594 miles. That makes it a long-haul flight, a widebody route with a full night's flying time. Of the 439 routes we track, it ranks 154 by distance.

The plane leaves Hong Kong heading south-east. On the map above, the line looks curved. That is normal. The shortest path over a round planet never looks straight on a flat screen. Our guide explains how the HKG-SYD route appears on a tracker map.

Why CX100 block time differs from cruise time

The schedule allows 9.1 hours from gate to gate. That works out to about 814 km/h. An Airbus A350-900 cruises faster than that. The gap is taxi time, climbing, descending and holding.

Winds aloft shift the real flight time by up to an hour in either direction. See how high-altitude winds behave in our guide to turbulence and jet streams.

Can the Airbus A350-900 comfortably fly CX100?

Not at all. At roughly 49% of its range, this is an easy trip for an Airbus A350-900. The airline picked it for cabin size, not distance. The full numbers are on our aircraft page for the Airbus A350-900.

What to know about CX100

  • Time change: you land 3 hours ahead of the time you left.
  • Crosses the equator: you swap seasons between takeoff and landing.

CX100 activity in the past 7 days

Our database contains 8 observations of CX100 across 8 UTC dates in this window, most recently 2026-10-29. Those records contain 6 distinct transponder addresses.

The median recorded visibility was 530 minutes. That is time inside receiver coverage, not airborne duration or an on-time-performance measurement.

Date (UTC)RouteFirst trackedLast trackedTracked for
2026-10-29 tracked in flight 04:25 UTC 12:06 UTC 7h 41m
2026-10-28 tracked in flight 04:23 UTC 13:17 UTC 8h 54m
2026-10-27 tracked in flight 04:18 UTC 12:58 UTC 8h 40m
2026-10-26 tracked in flight 04:26 UTC 13:20 UTC 8h 53m
2026-10-25 tracked in flight 04:21 UTC 13:24 UTC 9h 3m
2026-10-24 tracked in flight 04:31 UTC 13:17 UTC 8h 45m
2026-10-23 tracked in flight 04:12 UTC 12:58 UTC 8h 46m
2026-10-22 tracked in flight 04:23 UTC 13:20 UTC 8h 57m

“First/last tracked” are when CX100 entered and left receiver coverage, in UTC.

Airports and aircraft on CX100

Every scheduled service we follow is listed in the tracker directory, including Cathay Pacific and other tracked flights grouped by airline.

HKG Hong Kong International Airport Hong Kong, China · live radar →
SYD Sydney Kingsford Smith Airport Sydney, Australia · live radar →
A359 Airbus A350-900 Typical equipment · specs →

How much CO2 does CX100 emit?

Worked from the great-circle distance and the fuel burn measured for Airbus A350-900, the aircraft normally flying this route. Carbon dioxide only - see the method below.

Distance flown7,393 km
AircraftAirbus A350-900
Fuel burn rate6.03 kg per km
Fuel burned44,580 kg
CO2, whole flight140.9 tonnes
Seats, typical layout300
Passengers carried249 at an 83% load factor
CO2 per passenger566 kg

Where that lands by cabin

The aircraft burns the same fuel whoever is aboard, so the cabins divide one total rather than each carrying their own. A seat's share is the floor it takes up, which is why an economy seat comes out below the 566 kg cabin average and a flat bed well above it.

Economy246 seats, 204 flown
415 kg CO2 per seat
Business45 seats, 37 flown
1,204 kg CO2 per seat
First9 seats, 7 flown
1,661 kg CO2 per seat

Taken whole, CX100 emits what 2,348 trees take back out of the air in a year. One economy seat on it accounts for about the same carbon dioxide as driving a petrol car 3,328 km, or 16,164 km of the same journey by train.

How this is worked out. Fuel burn is read from published measurements of this type, taken at sectors of 9,208 km, 10,249 km and 12,116 km, all longer than this route, so the closest is held flat and the real figure is likely a little higher. It counts carbon dioxide only, and the cabin split assumes the layout typical of this size of aircraft. Read the full method, sources and caveats, or put CX100 against another flight.

Other tracked flights from Hong Kong

FlightRouteTypical aircraft
CX3479Hong Kong (HKG) → Mumbai (BOM) CX3479 flight tracker →
JL736Hong Kong (HKG) → Tokyo (NRT) Boeing 787-8 DreamlinerJL736 flight tracker →
CX565Taipei (TPE) → Hong Kong (HKG) 777 367CX565 flight tracker →
AC7Seoul (ICN) → Hong Kong (HKG) Boeing 787-9 DreamlinerAC7 flight tracker →
CX336Hong Kong (HKG) → Beijing (PEK) Airbus A330-300CX336 flight tracker →
CA109Beijing (PEK) → Hong Kong (HKG) Airbus A321CA109 flight tracker →

Guides relevant to CX100

Chosen from this route's distance, timing, aircraft, airline and airports.

Narrowbody vs widebody aircraft A long-haul sector makes aircraft size, cabin layout and range especially relevant.
Boeing versus Airbus The typical aircraft is built by Airbus; these visual clues help identify it.
Airline alliances explained Cathay Pacific belongs to oneworld, which affects connections and codeshares.

Data sources and review

Reviewed 2026-07-29 by Flight-Tracker.net Editorial Team

The route and typical schedule are maintained reference data. Live ADS-B observations are evidence of receiver coverage, not proof of on-time performance. Always confirm the operating date and times with the airline.

Read our schedule and observation review process, or inspect the machine-readable reference dataset.

Put CX100 on your own site

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CX100 frequently asked questions

How long is the CX100 flight?

Hong Kong to Sydney is 7,393 km (4,594 miles) in a straight line, scheduled at 9.1 hours gate to gate. Actual airborne time varies with winds, routing and holding.

What aircraft operates CX100?

Typically an Airbus A350-900 (full specifications), using roughly 49% of that type's published range.

Does CX100 fly every day?

The published pattern is daily, departing 09:20 local from HKG. Always confirm with the airline before travelling.

Can I track CX100 live?

Yes. Whenever CX100 is airborne and in receiver coverage the map above follows it live, with altitude, ground speed and heading. Between rotations, the seven-day log above shows where it has been.

More Cathay Pacific flights to watch

FlightRouteTypical aircraft
CX3479 Hong Kong (HKG) → Mumbai (BOM) CX3479 flight tracker →
CX565 Taipei (TPE) → Hong Kong (HKG) 777 367 CX565 flight tracker →
CX336 Hong Kong (HKG) → Beijing (PEK) Airbus A330-300 CX336 flight tracker →
CX725 Hong Kong (HKG) → Kuala Lumpur (KUL) 777 367 CX725 flight tracker →
CX256 London (LHR) → Hong Kong (HKG) Airbus A350-900 CX256 flight tracker →
CX888 Hong Kong (HKG) → Vancouver (YVR) → New York (JFK) Airbus A350-1000 CX888 flight tracker →
CX255 Hong Kong (HKG) → London (LHR) Airbus A350-1000 CX255 flight tracker →
CX880 Hong Kong (HKG) → Los Angeles (LAX) Boeing 777-300ER CX880 flight tracker →
CX520 Hong Kong (HKG) → Tokyo (NRT) Airbus A330-300 CX520 flight tracker →