Flight OddsUA4545 ORD → STL
United Airlines · Chicago, IL to St. Louis, MO · 15 flights observed, 2026-04-30 to 2026-05-18 · 258 mi
UA4545 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
-13 min
90th percentile
+535 min
Cancellation rate
0%
How often is UA4545 on time?
Across 15 flights on ORD → STL from 2026-04-30 to 2026-05-18, UA4545 arrived within 15 minutes of schedule 67% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived +535 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 | 10 | 67% |
| 16-30 min | 1 | 7% |
| 31-60 min | 1 | 7% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 3 | 20% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 1 | 100% | -36 min |
| 2026-05 | 14 | 64% | +125 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 33% |
| Tue | 1 | 0% |
| Wed | 2 | 100% |
| Thu | 3 | 33% |
| Fri | 3 | 100% |
| Sat | No data | — |
| Sun | 3 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…