CZ3256 ShanghaiSHA · 14:40 ShenzhenSZX · 17:10
CZ3256 by China Southern Airlines flies from Shanghai (SHA) to Shenzhen (SZX) for the Mon, Sep 21 departure.
departs SHA · on schedule
board checked 4m ago · checking again in 45s
⚖ CZ3256 typically leaves +13 and lands −25. The air wins minutes back.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 −25 min · 0 cancelled · 15 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SHA and SZX 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 Shanghai to Shenzhen flights today
same route · China Southern AirlinesIf CZ3256 is cancelled, these are the other China Southern Airlines nonstop flights from Shanghai to Shenzhen on the same day, with scheduled departure times in SHA local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How CZ3256 actually runs
Pro Flight Search has tracked every published board update for CZ3256 across the SHA and SZX boards: schedule changes, gate pushes and actual clocks. Usually lands ~25 min early. Based on 13 confirmed landings · 12/13 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 CZ3256 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-7588, B-20CK, B-2029, B-2009.
Board clocks recorded as SHA and SZX published them.
Planning around CZ3256? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — CZ3256 Shanghai to Shenzhen on-time performance, measured from the SHA and SZX airport boards.
https://proflightsearch.com/flight/CZ3256
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