Flight OddsSTL → ORD American Airlines
American Airlines · St. Louis, MO to Chicago, IL · 2,102 flights, 2025-07-01 to 2026-06-30 · aggregated across 93 flight numbers
On-time arrival
73%
Median delay
-6 min
90th percentile
+81 min
Cancellation rate
3%
How on-time is American Airlines from STL to ORD?
Across every American Airlines flight number on STL → ORD (2,102 flights, 2025-07-01 to 2026-06-30), 73% arrived within 15 minutes of schedule. Median arrival delay -6 min; the worst 10% ran +81 min or later. 3% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 1,480 | 73% |
| 16-30 min | 131 | 6% |
| 31-60 min | 162 | 8% |
| 61-120 min | 127 | 6% |
| 2+ hrs | 128 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 169 | 66% | +21 min |
| 2025-08 | 162 | 70% | +22 min |
| 2025-09 | 154 | 84% | +7 min |
| 2025-10 | 177 | 69% | +22 min |
| 2025-11 | 149 | 71% | +19 min |
| 2025-12 | 140 | 64% | +37 min |
| 2026-01 | 120 | 69% | +14 min |
| 2026-02 | 155 | 85% | +0 min |
| 2026-03 | 174 | 71% | +33 min |
| 2026-04 | 222 | 72% | +35 min |
| 2026-05 | 233 | 81% | +10 min |
| 2026-06 | 173 | 71% | +26 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 295 | 68% |
| Tue | 290 | 75% |
| Wed | 279 | 77% |
| Thu | 302 | 75% |
| Fri | 293 | 71% |
| Sat | 258 | 77% |
| Sun | 311 | 68% |
AA flight numbers on STL → ORD
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…