CX139Cathay Pacific · HKG → SYD
updated 7m ago
Route confirmed Cathay Pacific

CX139 Hong KongHKG · 08:45 SydneySYD · 20:50

CX139 by Cathay Pacific flies from Hong Kong (HKG) to Sydney (SYD) for the Sun, Nov 8 departure.

Right nowLanded in Sydney · today
20:46

arrived at SYD · 4 min early

Typical gate push+1 minmedian posted departure
Typical arrival−8 minmedian over 4 operations
Wins back in air~9 minmedian gate push vs arrival · how planes make up time →

Where the minutes go

last 4 operations · gate push → arrival
0+30+60+90 min
11-08
+15 gate · −4 arrival
11-07
+2 gate · +43 arrival
11-06
−1 gate · −17 arrival
11-05
+0 gate · −13 arrival

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The route today

live boards
HKGHong KongOn-time likelyHKG delay board →
SYDSydneyOn-time likelySYD delay board →
HKG→SYDevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
36%Chance of 15+ min delay
3.5%Chance of cancellation
+6 minTypical airport delay in this weather

Driven mainly by SYD (Sydney), currently flying MVFR (marginal visual). These figures come from both airports' records under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

Tomorrow at Hong Kong

Forecast

Mon 9 Nov, local date

High27°Clikely 26°C to 28°C
Low22°Clikely 19°C to 23°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

Tomorrow at Sydney

Forecast

Mon 9 Nov, local date

High21°Clikely 20°C to 22°C
Low13°Clikely 11°C to 15°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other Hong Kong to Sydney flights today

same route · Cathay Pacific
CX181departs 00:55
CX111departs 19:00
CX161departs 21:25

If CX139 is cancelled, these are the other Cathay Pacific nonstop flights from Hong Kong to Sydney on the same day, with scheduled departure times in HKG local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →

How CX139 actually runs

Pro Flight Search has tracked every published board update for CX139 across the HKG and SYD boards: schedule changes, gate pushes and actual clocks. Usually lands ~8 min early. Based on 4 confirmed landings · 3/4 within 15 min of schedule.

The verdict above is that record speaking, so it reflects how CX139 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocks

Board log

scheduled → actual, per operation
11-08HKG 08:45 09:00 (+15)SYD 20:50 20:46 (−4)
11-07HKG 08:45 08:47 (+2)SYD 20:50 21:33 (+43)
11-06HKG 08:45 08:44 (−1)SYD 20:50 20:33 (−17)
11-05HKG 08:45 (+0)SYD 20:50 20:37 (−13)

Board clocks recorded as HKG and SYD published them.

Planning around CX139? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: CX139 Hong Kong to Sydney on-time performance, measured from the HKG and SYD airport boards.

Canonical URL
https://proflightsearch.com/flight/CX139
How we measure this →