Flight OddsUA4552 ORD → STL
United Airlines · Chicago, IL to St. Louis, MO · 35 flights observed, 2026-05-21 to 2026-06-24 · 258 mi
UA4552 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
-7 min
90th percentile
+122 min
Cancellation rate
3%
How often is UA4552 on time?
Across 35 flights on ORD → STL from 2026-05-21 to 2026-06-24, UA4552 arrived within 15 minutes of schedule 68% of the time. The median arrival delay was -7 min, and the worst 10% of flights arrived +122 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 23 | 68% |
| 16-30 min | 3 | 9% |
| 31-60 min | 2 | 6% |
| 61-120 min | 2 | 6% |
| 2+ hrs | 4 | 12% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-05 | 11 | 73% | -6 min |
| 2026-06 | 23 | 65% | +67 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 60% |
| Tue | 5 | 80% |
| Wed | 5 | 20% |
| Thu | 4 | 100% |
| Fri | 5 | 100% |
| Sat | 5 | 80% |
| Sun | 5 | 40% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…