KE851 SeoulICN · 08:15 BeijingPEK · 09:40
KE851 by KOREAN AIRLINES flies from Seoul (ICN) to Beijing (PEK) for the Tue, Sep 8 departure.
departs ICN · on schedule
board checked 6m ago · checking again in 45s
⚖ KE851 typically leaves +23 and lands −24. 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 −24 min · 0 cancelled · 15 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Early read, sample still buildingConditions at ICN and PEK 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 Seoul to Beijing flights today
same route · KOREAN AIRLINESIf KE851 is cancelled, these are the other KOREAN AIRLINES nonstop flights from Seoul to Beijing on the same day, with scheduled departure times in ICN local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How KE851 actually runs
Pro Flight Search has tracked every published board update for KE851 across the ICN and PEK boards: schedule changes, gate pushes and actual clocks. Usually lands ~27 min early. Based on 13 confirmed landings · 13/13 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 KE851 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: HL8556.
Board clocks recorded as ICN and PEK published them.
Planning around KE851? 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 — KE851 Seoul to Beijing on-time performance, measured from the ICN and PEK airport boards.
https://proflightsearch.com/flight/KE851
.