Flight OddsDL499 DEN → BOS
Delta Air Lines · Denver, CO to Boston, MA · 349 flights observed, 2025-07-01 to 2026-06-30 · 1,754 mi
DL499 covers more than one route in the data window — the stats below are for DEN → BOS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
76%
Median delay
-3 min
90th percentile
+50 min
Cancellation rate
1%
How often is DL499 on time?
Across 349 flights on DEN → BOS from 2025-07-01 to 2026-06-30, DL499 arrived within 15 minutes of schedule 76% of the time. The median arrival delay was -3 min, and the worst 10% of flights arrived +50 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 260 | 76% |
| 16-30 min | 26 | 8% |
| 31-60 min | 28 | 8% |
| 61-120 min | 18 | 5% |
| 2+ hrs | 11 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 77% | +5 min |
| 2025-08 | 30 | 87% | -1 min |
| 2025-09 | 30 | 40% | +44 min |
| 2025-10 | 31 | 48% | +39 min |
| 2025-11 | 30 | 87% | -3 min |
| 2025-12 | 19 | 89% | -4 min |
| 2026-01 | 25 | 80% | +4 min |
| 2026-02 | 27 | 85% | -7 min |
| 2026-03 | 31 | 94% | 0 min |
| 2026-04 | 30 | 80% | +3 min |
| 2026-05 | 30 | 80% | +4 min |
| 2026-06 | 30 | 70% | +8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 47 | 79% |
| Tue | 50 | 68% |
| Wed | 50 | 72% |
| Thu | 50 | 68% |
| Fri | 50 | 82% |
| Sat | 48 | 94% |
| Sun | 48 | 69% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…