UA1857
United Airlines flight 1857 — Chicago (ORD) to Miami (MIA)
On time
83%
Avg delay
~58 min
Cancelled
1.3%
UA1857 is a reliable flight. About 83% 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 | 86% | 6.5% | 93 min |
| 2026-06 | 97% | 3.3% | 27 min |
| 2026-05 | 73% | 0.0% | 36 min |
| 2026-05 | 90% | 0.0% | 283 min |
| 2026-04 | 64% | 3.4% | 39 min |
| 2026-04 | 83% | 0.0% | 57 min |
| 2026-03 | 82% | 9.7% | 50 min |
| 2026-03 | 100% | 0.0% | 0 min |
| 2026-02 | 86% | 0.0% | 25 min |
| 2026-02 | 90% | 0.0% | 20 min |
| 2026-01 | 69% | 0.0% | 56 min |
| 2026-01 | 74% | 0.0% | 40 min |
Top delay cause
air traffic / NAS
Based on 1,881 tracked departures
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Get a free briefingData last updated October 2026. Source: Bureau of Transportation Statistics.