Flight OddsUA4576 ORD → STL
United Airlines · Chicago, IL to St. Louis, MO · 77 flights observed, 2026-02-12 to 2026-06-30 · 258 mi
UA4576 covers more than one route in the data window — the stats below are for ORD → STL, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
67%
Median delay
+1 min
90th percentile
+141 min
Cancellation rate
6%
How often is UA4576 on time?
Across 77 flights on ORD → STL from 2026-02-12 to 2026-06-30, UA4576 arrived within 15 minutes of schedule 67% of the time. The median arrival delay was +1 min, and the worst 10% of flights arrived +141 min or later. 6% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 48 | 67% |
| 16-30 min | 5 | 7% |
| 31-60 min | 6 | 8% |
| 61-120 min | 4 | 6% |
| 2+ hrs | 9 | 13% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-02 | 12 | 92% | -8 min |
| 2026-03 | 27 | 52% | +47 min |
| 2026-04 | 18 | 56% | +130 min |
| 2026-05 | 10 | 80% | +6 min |
| 2026-06 | 5 | 100% | -12 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 12 | 67% |
| Tue | 3 | 67% |
| Wed | 12 | 50% |
| Thu | 12 | 67% |
| Fri | 13 | 77% |
| Sat | 7 | 71% |
| Sun | 13 | 69% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…