Flight OddsAA4399 BOS → PHL
American Airlines · Boston, MA to Philadelphia, PA · 44 flights observed, 2026-04-07 to 2026-05-20 · 280 mi
AA4399 covers more than one route in the data window — the stats below are for BOS → PHL, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
91%
Median delay
-3 min
90th percentile
+15 min
Cancellation rate
0%
How often is AA4399 on time?
Across 44 flights on BOS → PHL from 2026-04-07 to 2026-05-20, AA4399 arrived within 15 minutes of schedule 91% of the time. The median arrival delay was -3 min, and the worst 10% of flights arrived +15 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 | 40 | 91% |
| 16-30 min | 3 | 7% |
| 31-60 min | 1 | 2% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 24 | 96% | -4 min |
| 2026-05 | 20 | 85% | +2 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 83% |
| Tue | 7 | 86% |
| Wed | 7 | 86% |
| Thu | 6 | 100% |
| Fri | 6 | 100% |
| Sat | 6 | 100% |
| 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…