Flight OddsAA4551 STL → ORD
American Airlines · St. Louis, MO to Chicago, IL · 17 flights observed, 2025-11-03 to 2025-11-19 · 258 mi
AA4551 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
82%
Median delay
-14 min
90th percentile
+22 min
Cancellation rate
0%
How often is AA4551 on time?
Across 17 flights on STL → ORD from 2025-11-03 to 2025-11-19, AA4551 arrived within 15 minutes of schedule 82% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +22 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 | 14 | 82% |
| 16-30 min | 1 | 6% |
| 31-60 min | 2 | 12% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 17 | 82% | -8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 67% |
| Tue | 3 | 100% |
| Wed | 3 | 100% |
| Thu | 2 | 100% |
| Fri | 2 | 0% |
| Sat | 2 | 100% |
| Sun | 2 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…