Flight OddsAA521 CHS → PHL
American Airlines · Charleston, SC to Philadelphia, PA · 51 flights observed, 2025-09-04 to 2025-11-01 · 550 mi
AA521 covers more than one route in the data window — the stats below are for CHS → PHL, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
86%
Median delay
-9 min
90th percentile
+28 min
Cancellation rate
0%
How often is AA521 on time?
Across 51 flights on CHS → PHL from 2025-09-04 to 2025-11-01, AA521 arrived within 15 minutes of schedule 86% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +28 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 | 44 | 86% |
| 16-30 min | 2 | 4% |
| 31-60 min | 3 | 6% |
| 61-120 min | 1 | 2% |
| 2+ hrs | 1 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-09 | 27 | 89% | -4 min |
| 2025-10 | 23 | 83% | +10 min |
| 2025-11 | 1 | 100% | -26 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 75% |
| Tue | 4 | 75% |
| Wed | 4 | 100% |
| Thu | 9 | 89% |
| Fri | 9 | 67% |
| Sat | 9 | 100% |
| Sun | 8 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…