Flight OddsUA4491 ORD → STL
United Airlines · Chicago, IL to St. Louis, MO · 135 flights observed, 2026-01-06 to 2026-05-20 · 258 mi
UA4491 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
68%
Median delay
-2 min
90th percentile
+109 min
Cancellation rate
2%
How often is UA4491 on time?
Across 135 flights on ORD → STL from 2026-01-06 to 2026-05-20, UA4491 arrived within 15 minutes of schedule 68% of the time. The median arrival delay was -2 min, and the worst 10% of flights arrived +109 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 89 | 68% |
| 16-30 min | 8 | 6% |
| 31-60 min | 12 | 9% |
| 61-120 min | 11 | 8% |
| 2+ hrs | 11 | 8% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 25 | 60% | +23 min |
| 2026-02 | 28 | 86% | -3 min |
| 2026-03 | 30 | 53% | +50 min |
| 2026-04 | 29 | 69% | +28 min |
| 2026-05 | 19 | 74% | +9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 17 | 71% |
| Tue | 20 | 75% |
| Wed | 20 | 65% |
| Thu | 19 | 68% |
| Fri | 19 | 63% |
| Sat | 19 | 63% |
| Sun | 17 | 71% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…