Flight OddsDL5811 BOS → DCA
Delta Air Lines · Boston, MA to Washington, DC · 146 flights observed, 2025-07-01 to 2025-12-18 · 399 mi
DL5811 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
48%
Median delay
+20 min
90th percentile
+126 min
Cancellation rate
7%
How often is DL5811 on time?
Across 146 flights on BOS → DCA from 2025-07-01 to 2025-12-18, DL5811 arrived within 15 minutes of schedule 48% of the time. The median arrival delay was +20 min, and the worst 10% of flights arrived +126 min or later. 7% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 65 | 48% |
| 16-30 min | 13 | 10% |
| 31-60 min | 24 | 18% |
| 61-120 min | 20 | 15% |
| 2+ hrs | 14 | 10% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 21 | 33% | +66 min |
| 2025-08 | 24 | 63% | +15 min |
| 2025-09 | 25 | 32% | +38 min |
| 2025-10 | 25 | 36% | +39 min |
| 2025-11 | 25 | 52% | +36 min |
| 2025-12 | 16 | 81% | +6 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 21 | 62% |
| Tue | 24 | 50% |
| Wed | 23 | 61% |
| Thu | 21 | 48% |
| Fri | 23 | 39% |
| Sat | 1 | 100% |
| Sun | 23 | 26% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…