OZ521 SeoulICN · 09:40 LondonLHR · 15:35
OZ521 by Asiana Airlines flies from Seoul (ICN) to London (LHR) for the Fri, Nov 13 departure.
departs ICN · on schedule
board checked 7m ago · checking again in 45s
⚖ OZ521 typically leaves +28 and lands −26. 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 −26 min · 0 cancelled · 16 operations tracked
The route today
live boardsTomorrow at London
ForecastFri 13 Nov, local date
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · 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.
How OZ521 actually runs
Pro Flight Search has tracked every published board update for OZ521 across the ICN and LHR boards: schedule changes, gate pushes and actual clocks. Usually lands ~26 min early. Based on 14 confirmed landings · 14/14 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 OZ521 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 ICN and LHR published them.
Planning around OZ521? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search: OZ521 Seoul to London on-time performance, measured from the ICN and LHR airport boards.
https://proflightsearch.com/flight/OZ521
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