UO663 Jeju CityCJU Hong KongHKG
UO663 by HK Express flies from Jeju City (CJU) to Hong Kong (HKG).
scheduled from CJU
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Early read, sample still buildingConditions at CJU 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. This route's tracked sample is still thin — treat these as an early read, not a precise forecast.
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 Jeju City to Hong Kong flights today
same route · HK ExpressIf UO663 is cancelled, these are the other HK Express nonstop flights from Jeju City to Hong Kong on the same day, with scheduled departure times in CJU local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UO663 actually runs
Pro Flight Search has tracked every published board update for UO663 across the CJU and HKG boards: schedule changes, gate pushes and actual clocks. Combined risk score: 26.2/100. Based on airport operations, weather, and cached board history at CJU and HKG.
The verdict above is that record speaking, so it reflects how UO663 operates rather than what the timetable promises. Numbers refresh as new flights operate.
Planning around UO663? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search — UO663 Jeju City to Hong Kong on-time performance, measured from the CJU and HKG airport boards.
https://proflightsearch.com/flight/UO663
.