UA2166
United Airlines flight 2166 — Phoenix (PHX) to San Francisco (SFO)
On time
79%
Avg delay
~66 min
Cancelled
1.3%
UA2166 is fairly reliable, though delays happen. About 79% 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 | 60% | 0.0% | 74 min |
| 2026-06 | 67% | 0.0% | 76 min |
| 2026-05 | 64% | 0.0% | 70 min |
| 2026-05 | 80% | 0.0% | 204 min |
| 2026-04 | 100% | 0.0% | 0 min |
| 2026-03 | 75% | 0.0% | 105 min |
| 2026-03 | 100% | 0.0% | 0 min |
| 2026-03 | 100% | 0.0% | 0 min |
| 2026-03 | 75% | 0.0% | 31 min |
| 2026-03 | 100% | 0.0% | 0 min |
| 2026-02 | 81% | 5.9% | 30 min |
| 2026-02 | 82% | 0.0% | 47 min |
Top delay cause
air traffic / NAS
Based on 1,994 tracked departures
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Get a free briefingData last updated October 2026. Source: Bureau of Transportation Statistics.