AA4539 PittsburghPIT · 08:00 ChicagoORD · 09:03
AA4539 by American Airlines flies from Pittsburgh (PIT) to Chicago (ORD).
scheduled from PIT
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 −20 min · 0 cancelled · 8 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at PIT 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 Pittsburgh to Chicago flights today
same route · American AirlinesIf AA4539 is cancelled, these are the other American Airlines nonstop flights from Pittsburgh to Chicago on the same day, with scheduled departure times in PIT local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How AA4539 actually runs
Pro Flight Search has tracked every published board update for AA4539 across the PIT and ORD boards: schedule changes, gate pushes and actual clocks. Usually lands ~20 min early. Based on 8 confirmed landings · 8/8 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 AA4539 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: N418YX, N135HQ, N437YX, N125HQ.
Board clocks recorded as PIT and ORD published them.
Planning around AA4539? 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 — AA4539 Pittsburgh to Chicago on-time performance, measured from the PIT and ORD airport boards.
https://proflightsearch.com/flight/AA4539
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