UA3421 ColumbusCMH · 12:30 ChicagoORD · 13:06
UA3421 by United Airlines flies from Columbus (CMH) to Chicago (ORD) for the Thu, Aug 20 departure.
departs CMH · on schedule
board checked 23m ago · checking again in 45s
Where the minutes go
last 5 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 +0 min · 0 cancelled · 5 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at CMH 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.
Other Columbus to Chicago flights today
same route · United AirlinesIf UA3421 is cancelled, these are the other United Airlines nonstop flights from Columbus to Chicago on the same day, with scheduled departure times in CMH local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA3421 actually runs
Pro Flight Search has tracked every published board update for UA3421 across the CMH and ORD boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 5 confirmed landings · 4/5 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 UA3421 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 CMH and ORD published them.
Planning around UA3421? 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 — UA3421 Columbus to Chicago on-time performance, measured from the CMH and ORD airport boards.
https://proflightsearch.com/flight/UA3421
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