Flight OddsDL5815 DCA → BOS
Delta Air Lines · Washington, DC to Boston, MA · 9 flights observed, 2025-12-21 to 2026-01-04 · 399 mi
DL5815 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
89%
Median delay
-14 min
90th percentile
+14 min
Cancellation rate
0%
How often is DL5815 on time?
Across 9 flights on DCA → BOS from 2025-12-21 to 2026-01-04, DL5815 arrived within 15 minutes of schedule 89% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +14 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 | 8 | 89% |
| 16-30 min | 0 | 0% |
| 31-60 min | 1 | 11% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 7 | 86% | -7 min |
| 2026-01 | 2 | 100% | -15 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 2 | 50% |
| Tue | 2 | 100% |
| Wed | No data | — |
| Thu | No data | — |
| Fri | 2 | 100% |
| Sat | No data | — |
| Sun | 3 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…