DL421
Delta Air Lines flight 421 — Detroit (DTW) to Las Vegas (LAS)
On time
82%
Avg delay
~62 min
Cancelled
0.3%
DL421 is a reliable flight. About 82% 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 | 50% | 3.2% | 38 min |
| 2026-06 | 73% | 0.0% | 51 min |
| 2026-05 | 74% | 0.0% | 40 min |
| 2026-04 | 93% | 0.0% | 51 min |
| 2026-04 | 100% | 0.0% | 0 min |
| 2026-03 | 77% | 0.0% | 44 min |
| 2026-03 | 94% | 0.0% | 81 min |
| 2026-02 | 75% | 0.0% | 45 min |
| 2026-02 | 86% | 0.0% | 30 min |
| 2026-01 | 73% | 0.0% | 81 min |
| 2026-01 | 85% | 0.0% | 99 min |
| 2025-12 | 64% | 0.0% | 64 min |
Top delay cause
airline operations
Based on 1,982 tracked departures
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Get a free briefingData last updated October 2026. Source: Bureau of Transportation Statistics.