Flight OddsDL5666 BOS → DCA
Delta Air Lines · Boston, MA to Washington, DC · 168 flights observed, 2025-12-21 to 2026-06-30 · 399 mi
DL5666 covers more than one route in the data window — the stats below are for BOS → DCA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
60%
Median delay
+5 min
90th percentile
+98 min
Cancellation rate
6%
How often is DL5666 on time?
Across 168 flights on BOS → DCA from 2025-12-21 to 2026-06-30, DL5666 arrived within 15 minutes of schedule 60% of the time. The median arrival delay was +5 min, and the worst 10% of flights arrived +98 min or later. 6% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 95 | 60% |
| 16-30 min | 9 | 6% |
| 31-60 min | 22 | 14% |
| 61-120 min | 21 | 13% |
| 2+ hrs | 11 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 7 | 71% | +13 min |
| 2026-01 | 24 | 71% | +11 min |
| 2026-02 | 22 | 50% | +26 min |
| 2026-03 | 25 | 60% | +36 min |
| 2026-04 | 25 | 56% | +23 min |
| 2026-05 | 27 | 59% | +34 min |
| 2026-06 | 28 | 61% | +30 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 25 | 80% |
| Tue | 27 | 74% |
| Wed | 23 | 48% |
| Thu | 24 | 46% |
| Fri | 26 | 54% |
| Sat | 7 | 86% |
| Sun | 26 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…