Flight OddsAA4521 STL → LGA
American Airlines · St. Louis, MO to New York, NY · 33 flights observed, 2026-04-12 to 2026-05-20 · 888 mi
AA4521 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
84%
Median delay
-22 min
90th percentile
+44 min
Cancellation rate
3%
How often is AA4521 on time?
Across 33 flights on STL → LGA from 2026-04-12 to 2026-05-20, AA4521 arrived within 15 minutes of schedule 84% of the time. The median arrival delay was -22 min, and the worst 10% of flights arrived +44 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 | 27 | 84% |
| 16-30 min | 0 | 0% |
| 31-60 min | 2 | 6% |
| 61-120 min | 2 | 6% |
| 2+ hrs | 1 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 16 | 75% | +2 min |
| 2026-05 | 16 | 94% | -16 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 100% |
| Tue | 6 | 100% |
| Wed | 5 | 60% |
| Thu | 5 | 100% |
| Fri | 5 | 60% |
| Sat | No data | — |
| 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…