DL499
Delta Air Lines flight 499 — Boston (BOS) to Denver (DEN)
On time
80%
Avg delay
~48 min
Cancelled
1.1%
DL499 is a reliable flight. About 80% of departures arrive on time. When delays happen, the most common cause is air traffic / NAS.
Monthly breakdown
| Month | On time | Cancelled | Avg delay |
|---|---|---|---|
| 2026-07 | 83% | 3.2% | 44 min |
| 2026-07 | 63% | 3.2% | 44 min |
| 2026-06 | 90% | 0.0% | 44 min |
| 2026-06 | 70% | 0.0% | 43 min |
| 2026-05 | 93% | 3.2% | 54 min |
| 2026-05 | 80% | 3.2% | 46 min |
| 2026-04 | 100% | 0.0% | 0 min |
| 2026-04 | 80% | 0.0% | 43 min |
| 2026-03 | 71% | 0.0% | 35 min |
| 2026-03 | 94% | 0.0% | 89 min |
| 2026-02 | 96% | 7.1% | 46 min |
| 2026-02 | 85% | 3.6% | 31 min |
Top delay cause
air traffic / NAS
Based on 2,148 tracked departures
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Get a free briefingData last updated October 2026. Source: Bureau of Transportation Statistics.