Flight OddsAA4635 DCA → BOS
American Airlines · Washington, DC to Boston, MA · 21 flights observed, 2026-02-12 to 2026-03-07 · 399 mi
AA4635 covers more than one route in the data window — the stats below are for DCA → BOS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
70%
Median delay
-4 min
90th percentile
+38 min
Cancellation rate
5%
How often is AA4635 on time?
Across 21 flights on DCA → BOS from 2026-02-12 to 2026-03-07, AA4635 arrived within 15 minutes of schedule 70% of the time. The median arrival delay was -4 min, and the worst 10% of flights arrived +38 min or later. 5% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 14 | 70% |
| 16-30 min | 3 | 15% |
| 31-60 min | 2 | 10% |
| 61-120 min | 1 | 5% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-02 | 14 | 79% | -2 min |
| 2026-03 | 6 | 50% | +23 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 2 | 50% |
| Tue | 3 | 100% |
| Wed | 3 | 67% |
| Thu | 4 | 75% |
| Fri | 4 | 50% |
| Sat | 4 | 75% |
| Sun | No data | — |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…