UA2309
United Airlines flight 2309 — Denver (DEN) to San Diego (SAN)
On time
82%
Avg delay
~56 min
Cancelled
0.3%
UA2309 is a reliable flight. About 82% of departures arrive on time. When delays happen, the most common cause is late-arriving aircraft.
Monthly breakdown
| Month | On time | Cancelled | Avg delay |
|---|---|---|---|
| 2026-07 | 84% | 0.0% | 48 min |
| 2026-07 | 74% | 0.0% | 33 min |
| 2026-06 | 83% | 0.0% | 35 min |
| 2026-06 | 50% | 0.0% | 43 min |
| 2026-05 | 97% | 0.0% | 19 min |
| 2026-05 | 45% | 0.0% | 49 min |
| 2026-04 | 100% | 0.0% | 0 min |
| 2026-04 | 60% | 0.0% | 38 min |
| 2026-03 | 96% | 0.0% | 20 min |
| 2026-03 | 100% | 0.0% | 0 min |
| 2026-02 | 91% | 0.0% | 127 min |
| 2026-02 | 86% | 0.0% | 44 min |
Top delay cause
late-arriving aircraft
Based on 2,036 tracked departures
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Get a free briefingData last updated October 2026. Source: Bureau of Transportation Statistics.