UO640 Hong KongHKG · 15:25 Jeju CityCJU · 19:10
UO640 by HK Express flies from Hong Kong (HKG) to Jeju City (CJU) for the Tue, Oct 27 departure.
departs HKG · on schedule
board checked 32m ago · checking again in 45s
The route today
live boardsWhen it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Hong Kong to Jeju City flights today
same route · HK ExpressIf UO640 is cancelled, these are the other HK Express nonstop flights from Hong Kong to Jeju City 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 UO640 actually runs
Pro Flight Search has tracked every published board update for UO640 across the HKG and CJU boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: landed +22 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how UO640 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as HKG and CJU published them.
Planning around UO640? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UO640 Hong Kong to Jeju City on-time performance, measured from the HKG and CJU airport boards.
https://proflightsearch.com/flight/UO640
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