DL1421
Delta Air Lines flight 1421 — San Francisco (SFO) to Los Angeles (LAX)
On time
91%
Avg delay
~65 min
Cancelled
1.5%
DL1421 is a reliable flight. About 91% 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 | 83% | 6.5% | 41 min |
| 2026-07 | 83% | 6.5% | 56 min |
| 2026-06 | 83% | 0.0% | 32 min |
| 2026-06 | 83% | 0.0% | 25 min |
| 2026-05 | 93% | 3.3% | 30 min |
| 2026-05 | 97% | 3.3% | 18 min |
| 2026-04 | 96% | 3.6% | 116 min |
| 2026-04 | 81% | 3.6% | 114 min |
| 2026-03 | 96% | 16.7% | 30 min |
| 2026-03 | 100% | 16.7% | 0 min |
| 2026-02 | 100% | 4.2% | 0 min |
| 2026-02 | 91% | 4.2% | 19 min |
Top delay cause
airline operations
Based on 2,236 tracked departures
Flying DL1421? Get a free briefing.
Weather, delays, and what to expect — sent to your inbox before your flight.
Get a free briefingData last updated October 2026. Source: Bureau of Transportation Statistics.