CX257Cathay Pacific · HKG → LHR
live · 10m ago
Route confirmed Cathay Pacific

CX257 Hong KongHKG · 08:05 LondonLHR · 15:15

CX257 by Cathay Pacific flies from Hong Kong (HKG) to London (LHR) for the Tue, Oct 20 departure.

Right nowEn route to London · off blocks 08:03 · 2 min early
14:39

estimated arrival at LHR · local time · ~7h 02m from now

En routeCX257 · position estimated
HKGHong KongLHRLondon
Estimated from the boardsarr 14:39

Board estimate · gate and arrival times. Off blocks 08:03 · typical taxi-out at HKG ≈ 10.9 min. No receiver coverage over open ocean.

⚖ CX257 typically leaves +1 and lands −22. The air wins minutes back.
Typical gate push+1 minmedian posted departure
Typical arrival−22 minmedian over 15 operations
Wins back in air~23 minmedian gate push vs arrival · how planes make up time → Cancellation0 in 15tracked operations · cancellation odds calculator →

Where the minutes go

last 7 operations · gate push → arrival
0+30+60+90 min
10-20
−2 gate · −36 arrival
10-19
−4 gate · −50 arrival
10-18
+19 gate · −11 arrival
10-17
+11 gate · −10 arrival
10-16
−4 gate · −27 arrival
10-15
+1 gate · +14 arrival
10-14
−2 gate · −30 arrival

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

The last 30 days

arrival outcome per operation

median arrival −22 min · 0 cancelled · 15 operations tracked

The route today

live boards
HKGHong KongOn-time likelyHKG delay board →
LHRLondonHigh riskLHR delay board →
HKG→LHRevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
33%Chance of 15+ min delay
2.1%Chance of cancellation
+3 minAvg hub delay right now

Driven mainly by HKG (Hong Kong), currently flying VFR (visual). For this route and airline, 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 →

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 London flights today

same route · Cathay Pacific
CX239departs 11:05
CX253departs 13:25
CX251departs 22:45
CX237departs 23:05
CX255departs 23:15

If CX257 is cancelled, these are the other Cathay Pacific nonstop flights from Hong Kong to London on the same day, with scheduled departure times in HKG local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →

How CX257 actually runs

Pro Flight Search has tracked every published board update for CX257 across the HKG and LHR boards: schedule changes, gate pushes and actual clocks. Usually lands ~22 min early. Based on 13 confirmed landings · 13/13 within 15 min of schedule. Pushes back late but makes up time in the air.

The verdict above is that record speaking, so it reflects how CX257 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
10-20HKG 08:05 08:03 (−2)LHR 15:15 14:39 (−36)
10-19HKG 08:05 08:01 (−4)LHR 15:15 14:25 (−50)
10-18HKG 08:05 08:24 (+19)LHR 15:15 15:04 (−11)
10-17HKG 08:05 08:16 (+11)LHR 15:15 15:05 (−10)
10-16HKG 08:05 08:01 (−4)LHR 15:15 14:48 (−27)
10-15HKG 08:05 08:06 (+1)LHR 15:15 15:29 (+14)
10-14HKG 08:05 08:03 (−2)LHR 15:15 14:45 (−30)
10-13HKG 08:05 08:09 (+4)LHR 15:15 14:52 (−23)
10-12HKG 08:05 08:32 (+27)LHR 15:15 15:21 (+6)
10-11HKG 08:05 08:09 (+4)LHR 15:15 14:53 (−22)
10-10HKG 08:05 08:10 (+5)LHR 15:15 14:56 (−19)
10-09HKG 08:05 08:11 (+6)LHR 15:15 15:19 (+4)
10-08HKG 08:05 08:06 (+1)LHR 15:15 14:45 (−30)
10-07HKG 08:05 08:06 (+1)LHR 15:15 14:41 (−34)
10-06HKG 08:05 (+0)LHR 15:15 14:57 (−18)

Board clocks recorded as HKG and LHR published them.

Planning around CX257? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

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Suggested citation

Pro Flight Search — CX257 Hong Kong to London on-time performance, measured from the HKG and LHR airport boards.

Canonical URL
https://proflightsearch.com/flight/CX257
How we measure this →