UA4576United Airlines · ORD → STL
live · 44m ago
Route confirmed United Airlines

UA4576 ChicagoORD · 21:30 St LouisSTL · 22:59

UA4576 by United Airlines flies from Chicago (ORD) to St Louis (STL) for the Fri, Oct 16 departure.

Right nowScheduled · gate F11 · as of 10:58
21:30

departs ORD · on schedule

Typical gate push+22 minmedian posted departure
Typical arrival+21 minmedian over 3 operations
Wins back in air~1 minmedian gate push vs arrival · how planes make up time →

Where the minutes go

last 3 operations · gate push → arrival
0+30+60+90 min
10-16
+21 arrival
10-15
+22 gate · +21 arrival
10-14
+17 gate · +14 arrival

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The route today

live boards
ORDChicagoOn-time likelyORD delay board →
STLSt LouisOn-time likelySTL delay board →
ORD→STLevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
49%Chance of 15+ min delay
1.4%Chance of cancellation
+19 minAvg hub delay right now

Driven 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 departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other Chicago to St Louis flights today

same route · United Airlines
UA4681departs 07:05
UA5958departs 07:05
UA3378departs 07:45
UA4613departs 09:15
UA3375departs 10:00
UA1044departs 10:40

If UA4576 is cancelled, these are the other United Airlines nonstop flights from Chicago to St Louis on the same day, with scheduled departure times in ORD local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →

How UA4576 actually runs

Pro Flight Search has tracked every published board update for UA4576 across the ORD and STL boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 3 completed legs so far: landed +26 min. Not enough to call it.

The verdict above is that record speaking, so it reflects how UA4576 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocksaircraft

Board log

scheduled → actual, per operation
10-16ORD 21:30STL 22:59 23:20 (+21)
10-15ORD 21:30 21:52 (+22)STL 22:59 23:20 (+21)
10-14ORD 21:30 21:47 (+17)STL 22:59 23:13 (+14)

Aircraft

Recent tails: N511GJ, N513GJ.

Board clocks recorded as ORD and STL published them.

Planning around UA4576? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — UA4576 Chicago to St Louis on-time performance, measured from the ORD and STL airport boards.

Canonical URL
https://proflightsearch.com/flight/UA4576
How we measure this →