Flight OddsORD → STL United Airlines
United Airlines · Chicago, IL to St. Louis, MO · 3,021 flights, 2025-07-01 to 2026-06-30 · aggregated across 83 flight numbers
On-time arrival
69%
Median delay
-2 min
90th percentile
+94 min
Cancellation rate
3%
How on-time is United Airlines from ORD to STL?
Across every United Airlines flight number on ORD → STL (3,021 flights, 2025-07-01 to 2026-06-30), 69% arrived within 15 minutes of schedule. Median arrival delay -2 min; the worst 10% ran +94 min or later. 3% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 2,035 | 69% |
| 16-30 min | 229 | 8% |
| 31-60 min | 223 | 8% |
| 61-120 min | 242 | 8% |
| 2+ hrs | 206 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 246 | 63% | +32 min |
| 2025-08 | 228 | 76% | +16 min |
| 2025-09 | 230 | 82% | +4 min |
| 2025-10 | 233 | 79% | +10 min |
| 2025-11 | 225 | 68% | +34 min |
| 2025-12 | 227 | 61% | +46 min |
| 2026-01 | 223 | 63% | +24 min |
| 2026-02 | 229 | 76% | +5 min |
| 2026-03 | 254 | 58% | +38 min |
| 2026-04 | 259 | 64% | +36 min |
| 2026-05 | 298 | 70% | +22 min |
| 2026-06 | 283 | 72% | +20 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 422 | 71% |
| Tue | 421 | 75% |
| Wed | 431 | 67% |
| Thu | 420 | 71% |
| Fri | 428 | 65% |
| Sat | 396 | 71% |
| Sun | 417 | 65% |
UA flight numbers on ORD → STL
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…