UA12 ZurichZRH · 09:50 ChicagoORD · 12:55
UA12 by United Airlines flies from Zurich (ZRH) to Chicago (ORD) for the Wed, Sep 9 departure.
arrived at ORD · 6 min early
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 −6 min · 0 cancelled · 7 operations tracked
The route today
live boardsWeather lens
Weather-conditioned outlook for this flight right now
Measured, 90-day sampleDriven mainly by ORD (Chicago), currently flying MVFR (marginal visual). For this route and airline, 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 →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
How UA12 actually runs
Pro Flight Search has tracked every published board update for UA12 across the ZRH and ORD boards: schedule changes, gate pushes and actual clocks. Usually lands ~6 min early. Based on 7 confirmed landings · 5/7 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 UA12 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: N653UA, N663UA, N685UA, N676UA.
Board clocks recorded as ZRH and ORD published them.
Planning around UA12? 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 — UA12 Zurich to Chicago on-time performance, measured from the ZRH and ORD airport boards.
https://proflightsearch.com/flight/UA12
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