CX521 TokyoNRT · 16:50 Hong KongHKG · 21:10
CX521 by Cathay Pacific flies from Tokyo (NRT) to Hong Kong (HKG) for the Tue, Oct 27 departure.
estimated arrival at HKG · local time · ~3h 41m from now
position updated 7m ago · checking again in 90s
Live position · flown path, last 30 min
Where the minutes go
last 7 operations · gate push → arrivalThe 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 operationmedian arrival +13 min · 0 cancelled · 14 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at NRT and HKG are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. 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 departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Tokyo to Hong Kong flights today
same route · Cathay PacificIf CX521 is cancelled, these are the other Cathay Pacific nonstop flights from Tokyo to Hong Kong on the same day, with scheduled departure times in NRT local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How CX521 actually runs
Pro Flight Search has tracked every published board update for CX521 across the NRT and HKG boards: schedule changes, gate pushes and actual clocks. Usually lands ~11 min late. Based on 13 confirmed landings · 8/13 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 CX521 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: B-HNN, B-HNG, B-HNK, B-HNE.
Board clocks recorded as NRT and HKG published them.
Planning around CX521? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — CX521 Tokyo to Hong Kong on-time performance, measured from the NRT and HKG airport boards.
https://proflightsearch.com/flight/CX521
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