Flight OddsUA4515 ORD → STL
United Airlines · Chicago, IL to St. Louis, MO · 15 flights observed, 2026-02-12 to 2026-03-04 · 258 mi
UA4515 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
73%
Median delay
+8 min
90th percentile
+35 min
Cancellation rate
0%
How often is UA4515 on time?
Across 15 flights on ORD → STL from 2026-02-12 to 2026-03-04, UA4515 arrived within 15 minutes of schedule 73% of the time. The median arrival delay was +8 min, and the worst 10% of flights arrived +35 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 | 11 | 73% |
| 16-30 min | 2 | 13% |
| 31-60 min | 2 | 13% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-02 | 12 | 67% | +9 min |
| 2026-03 | 3 | 100% | +3 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 100% |
| Tue | No data | — |
| Wed | 3 | 67% |
| Thu | 3 | 67% |
| Fri | 3 | 67% |
| Sat | No data | — |
| Sun | 3 | 67% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…