Flight OddsAA1997 STL → ORD
American Airlines · St. Louis, MO to Chicago, IL · 86 flights observed, 2025-08-07 to 2025-11-01 · 258 mi
AA1997 covers more than one route in the data window — the stats below are for STL → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
88%
Median delay
-10 min
90th percentile
+18 min
Cancellation rate
1%
How often is AA1997 on time?
Across 86 flights on STL → ORD from 2025-08-07 to 2025-11-01, AA1997 arrived within 15 minutes of schedule 88% of the time. The median arrival delay was -10 min, and the worst 10% of flights arrived +18 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 75 | 88% |
| 16-30 min | 2 | 2% |
| 31-60 min | 2 | 2% |
| 61-120 min | 4 | 5% |
| 2+ hrs | 2 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 24 | 88% | +16 min |
| 2025-09 | 30 | 90% | -2 min |
| 2025-10 | 30 | 90% | -5 min |
| 2025-11 | 1 | 0% | +268 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 11 | 91% |
| Tue | 11 | 100% |
| Wed | 12 | 92% |
| Thu | 13 | 85% |
| Fri | 13 | 92% |
| Sat | 13 | 69% |
| Sun | 12 | 92% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…