DL508
Delta Air Lines flight 508 — Seattle (SEA) to Washington (IAD)
On time
84%
Avg delay
~66 min
Cancelled
0.7%
DL508 is a reliable flight. About 84% of departures arrive on time. When delays happen, the most common cause is airline operations.
Monthly breakdown
| Month | On time | Cancelled | Avg delay |
|---|---|---|---|
| 2026-07 | 71% | 0.0% | 45 min |
| 2026-07 | 61% | 0.0% | 56 min |
| 2026-06 | 100% | 0.0% | 0 min |
| 2026-06 | 100% | 0.0% | 0 min |
| 2026-06 | 100% | 0.0% | 0 min |
| 2026-06 | 71% | 0.0% | 36 min |
| 2026-05 | 100% | 0.0% | 0 min |
| 2026-05 | 65% | 0.0% | 43 min |
| 2026-04 | 100% | 0.0% | 0 min |
| 2026-03 | 90% | 3.2% | 109 min |
| 2026-02 | 96% | 0.0% | 37 min |
| 2026-01 | 93% | 0.0% | 52 min |
Top delay cause
airline operations
Based on 1,780 tracked departures
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Get a free briefingData last updated October 2026. Source: Bureau of Transportation Statistics.