Flight OddsDL5820 DCA → BOS
Delta Air Lines · Washington, DC to Boston, MA · 31 flights observed, 2026-05-07 to 2026-06-06 · 399 mi
DL5820 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
52%
Median delay
+15 min
90th percentile
+91 min
Cancellation rate
0%
How often is DL5820 on time?
Across 31 flights on DCA → BOS from 2026-05-07 to 2026-06-06, DL5820 arrived within 15 minutes of schedule 52% of the time. The median arrival delay was +15 min, and the worst 10% of flights arrived +91 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 | 16 | 52% |
| 16-30 min | 5 | 16% |
| 31-60 min | 4 | 13% |
| 61-120 min | 4 | 13% |
| 2+ hrs | 2 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-05 | 25 | 44% | +34 min |
| 2026-06 | 6 | 83% | +3 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 50% |
| Tue | 4 | 25% |
| Wed | 4 | 50% |
| Thu | 5 | 60% |
| Fri | 5 | 60% |
| Sat | 5 | 80% |
| Sun | 4 | 25% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…