UA1811
United Airlines flight 1811 — Denver (DEN) to Chicago (ORD)
On time
79%
Avg delay
~64 min
Cancelled
0.9%
UA1811 is fairly reliable, though delays happen. About 79% 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 | 64% | 3.8% | 62 min |
| 2026-07 | 81% | 0.0% | 44 min |
| 2026-06 | 81% | 0.0% | 46 min |
| 2026-06 | 93% | 0.0% | 23 min |
| 2026-05 | 85% | 0.0% | 32 min |
| 2026-05 | 90% | 0.0% | 85 min |
| 2026-04 | 87% | 0.0% | 45 min |
| 2026-04 | 83% | 3.3% | 37 min |
| 2026-03 | 79% | 3.4% | 71 min |
| 2026-03 | 83% | 3.2% | 108 min |
| 2026-02 | 85% | 0.0% | 25 min |
| 2026-02 | 96% | 3.6% | 269 min |
Top delay cause
late-arriving aircraft
Based on 2,004 tracked departures
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Get a free briefingData last updated October 2026. Source: Bureau of Transportation Statistics.