UO646 Hong KongHKG · 13:00 TokyoNRT · 18:05
UO646 by HK Express flies from Hong Kong (HKG) to Tokyo (NRT) for the Sun, Nov 1 departure.
departs HKG · on schedule
board checked 55m ago · checking again in 45s
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 −9 min · 0 cancelled · 16 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at HKG and NRT are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records 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 →
Tomorrow at Hong Kong
ForecastMon 2 Nov, local date
- Chance a departure is cancelled
- 0.4%usually 0.6%
- Chance a departure leaves 60+ min late
- 3.3%usually 3.8%
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Based on about 440 departures a day. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
Tomorrow at Tokyo
ForecastMon 2 Nov, local date
- Chance a departure is cancelled
- 1.8%usually 1.8%
- Chance a departure leaves 60+ min late
- 3.3%usually 3.5%
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Based on about 320 departures a day. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Hong Kong to Tokyo flights today
same route · HK ExpressIf UO646 is cancelled, these are the other HK Express nonstop flights from Hong Kong to Tokyo on the same day, with scheduled departure times in HKG local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →
How UO646 actually runs
Pro Flight Search has tracked every published board update for UO646 across the HKG and NRT boards: schedule changes, gate pushes and actual clocks. Usually lands ~7 min early. Based on 14 confirmed landings · 13/14 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how UO646 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-KKJ, B-KKN, B-KKP, B-KKE.
Board clocks recorded as HKG and NRT published them.
Planning around UO646? 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: UO646 Hong Kong to Tokyo on-time performance, measured from the HKG and NRT airport boards.
https://proflightsearch.com/flight/UO646
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