Flight OddsUA4518 ORD → STL
United Airlines · Chicago, IL to St. Louis, MO · 228 flights observed, 2025-07-01 to 2026-06-30 · 258 mi
UA4518 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
65%
Median delay
-1 min
90th percentile
+94 min
Cancellation rate
2%
How often is UA4518 on time?
Across 228 flights on ORD → STL from 2025-07-01 to 2026-06-30, UA4518 arrived within 15 minutes of schedule 65% of the time. The median arrival delay was -1 min, and the worst 10% of flights arrived +94 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 | 146 | 65% |
| 16-30 min | 21 | 9% |
| 31-60 min | 12 | 5% |
| 61-120 min | 28 | 13% |
| 2+ hrs | 16 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 52% | +35 min |
| 2025-08 | 31 | 61% | +65 min |
| 2025-09 | 29 | 76% | +3 min |
| 2025-10 | 22 | 59% | +30 min |
| 2025-12 | 14 | 71% | +11 min |
| 2026-01 | 30 | 60% | +41 min |
| 2026-02 | 25 | 84% | -1 min |
| 2026-03 | 7 | 43% | +64 min |
| 2026-05 | 8 | 75% | +23 min |
| 2026-06 | 26 | 69% | +12 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 33 | 67% |
| Tue | 31 | 77% |
| Wed | 31 | 58% |
| Thu | 33 | 67% |
| Fri | 31 | 65% |
| Sat | 31 | 68% |
| Sun | 33 | 58% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…