Flight OddsAA4509 STL → LGA
American Airlines · St. Louis, MO to New York, NY · 34 flights observed, 2026-05-21 to 2026-06-30 · 888 mi
AA4509 covers more than one route in the data window — the stats below are for STL → LGA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
75%
Median delay
-10 min
90th percentile
+61 min
Cancellation rate
3%
How often is AA4509 on time?
Across 34 flights on STL → LGA from 2026-05-21 to 2026-06-30, AA4509 arrived within 15 minutes of schedule 75% of the time. The median arrival delay was -10 min, and the worst 10% of flights arrived +61 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 24 | 75% |
| 16-30 min | 2 | 6% |
| 31-60 min | 2 | 6% |
| 61-120 min | 2 | 6% |
| 2+ hrs | 2 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-05 | 8 | 63% | +39 min |
| 2026-06 | 24 | 79% | +3 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 100% |
| Tue | 6 | 83% |
| Wed | 5 | 60% |
| Thu | 6 | 83% |
| Fri | 6 | 67% |
| Sat | No data | — |
| Sun | 4 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…