Flight OddsAA4135 STL → ORD
American Airlines · St. Louis, MO to Chicago, IL · 43 flights observed, 2026-04-07 to 2026-05-20 · 258 mi
AA4135 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
84%
Median delay
-12 min
90th percentile
+30 min
Cancellation rate
0%
How often is AA4135 on time?
Across 43 flights on STL → ORD from 2026-04-07 to 2026-05-20, AA4135 arrived within 15 minutes of schedule 84% of the time. The median arrival delay was -12 min, and the worst 10% of flights arrived +30 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 | 36 | 84% |
| 16-30 min | 2 | 5% |
| 31-60 min | 2 | 5% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 3 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 24 | 88% | +61 min |
| 2026-05 | 19 | 79% | +29 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 67% |
| Tue | 7 | 86% |
| Wed | 7 | 86% |
| Thu | 5 | 100% |
| Fri | 6 | 83% |
| Sat | 6 | 83% |
| Sun | 6 | 83% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…