UA423 AthensATH · 12:35 ChicagoORD · 16:00
UA423 by United Airlines flies from Athens (ATH) to Chicago (ORD) for the Thu, Sep 17 departure.
estimated arrival at ORD · local time · ~6h 34m from now
board checked 2m ago · checking again in 45s
Board estimate · gate and arrival times. Off blocks 12:59 · typical taxi-out at ATH ≈ 9 min. No receiver coverage over open ocean.
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at ATH and ORD 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.
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 UA423 actually runs
Pro Flight Search has tracked every published board update for UA423 across the ATH and ORD boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: departed +165 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how UA423 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 ATH and ORD published them.
Planning around UA423? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA423 Athens to Chicago on-time performance, measured from the ATH and ORD airport boards.
https://proflightsearch.com/flight/UA423
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