Flight OddsUA4487 STL → ORD
United Airlines · St. Louis, MO to Chicago, IL · 39 flights observed, 2026-02-12 to 2026-05-20 · 258 mi
UA4487 covers more than one route in the data window — the stats below are for STL → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
41%
Median delay
+22 min
90th percentile
+134 min
Cancellation rate
0%
How often is UA4487 on time?
Across 39 flights on STL → ORD from 2026-02-12 to 2026-05-20, UA4487 arrived within 15 minutes of schedule 41% of the time. The median arrival delay was +22 min, and the worst 10% of flights arrived +134 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 16 | 41% |
| 16-30 min | 11 | 28% |
| 31-60 min | 4 | 10% |
| 61-120 min | 3 | 8% |
| 2+ hrs | 5 | 13% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-02 | 14 | 57% | +28 min |
| 2026-03 | 4 | 25% | +43 min |
| 2026-04 | 1 | 100% | -12 min |
| 2026-05 | 20 | 30% | +52 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 33% |
| Tue | 6 | 50% |
| Wed | 6 | 33% |
| Thu | 6 | 50% |
| Fri | 6 | 33% |
| Sat | 3 | 33% |
| Sun | 6 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…